Things I learned in physics class
POSTED BY: BadgersHat
UPDATED: Friday, August 12, 2005 15:00
VIEWED: 25249
PAGE 1 of 2
So, let's discuss, how does modern day physics relate to Firefly?
Here's absolutely EVERYTHING I remember from high school physics:
1) F=MA (Force = Mass x Acceleration--basically the faster an object is moving, and the heavier and denser it is, the louder the crunch when it hits something)
2) You can't push a rope.
That's it, there's nothing else in my head.
So, how can we apply these two fundamental principles of physics to the Fireflyverse?
I await your input with baited breath.
--Jefé The Hat
***************************
--You probably don't recognize me without my cape...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
...Not sure about that. But it does bring up one point about space travel that I think can go along side your question.
In space gravity is severly limited. Tends to act like heavy objects on a water bed. The gravitational influences only go so far.
There is no "air" in space.
There are solar winds. Though the effects of those are fairly limited.
Everybody agree so far?
Then why all the grief in real science and sci-fi about the ammount of fuel you would need to use to travel between stars? Aim... floor it... and turn off the engines and coast. You may well need to do some minor course corrections, and if you need to turn you'll need to burn, but other than that: what's the big deal?
When I die I want to go peacefully in my sleep like my grandpa. Not screaming and yelling like everyone else in the car he was driving.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ReaverMadness:
[BThen why all the grief in real science and sci-fi about the ammount of fuel you would need to use to travel between stars? Aim... floor it... and turn off the engines and coast. You may well need to do some minor course corrections, and if you need to turn you'll need to burn, but other than that: what's the big deal?
Well, to get to relativistic speeds would take a lot of fuel. Unless you get to that speed level you would be talking about a LONG trip. And then there's the stopping when you get there, which would take just as much.
If your story involves ftl speeds then your working with mostly made up physics, and the vehicle can be as fuel efficient or as inefficient as the drama requires.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
....and everything else is magic.
I have a confession. I didn't take physics. It conflicted with something, I don't remember what. It's more of a hobby. Wish I had taken it. When I have trouble understanding an equation or theory, I ask my dad. He's also a hobbyist. Two amateurs with no formal training sit around and talk about physics. I can only imagine how wrong we are! I'm monitoring this thread in hopes of learning something. So be smart!
thatweirdgirl with a crush on Michio Kaku
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ReaverMadness:
Then why all the grief in real science and sci-fi about the ammount of fuel you would need to use to travel between stars? Aim... floor it... and turn off the engines and coast. You may well need to do some minor course corrections, and if you need to turn you'll need to burn, but other than that: what's the big deal?
In addition to what Dug said (Space is BIG. Really, really big. Unless you're going VERY, VERY fast, it's going to take a hell of a long time to get to the nearest star.)
If your plan is to get to super-fast in the first few seconds of the journey and then coast the rest of the way, there's two big problems - 1) You can only accelerate a certain amount before it's just too much for the human body to take, which limits your initial startup speed. 2) Once you start coasting, you're going to be in zero-gee for the entire trip unless you have some way around it.
One of the best realistic SF solutions to both those problems is to have a ship accelerating at a constant 1G for half the trip, and then decellerate at 1G for the other half, giving the entire spaceship an Earthlike gravity, with Down being the direction the engines are pointed, (although they have a brief period of zero G and readjustment as up becomes down for the rest of the trip). This requires a lot of fuel, however.
Star Pilot Grainger
"Remember, the enemy's gate is down."
LJ: http://www.livejournal.com/users/newnumber6 (real)
http://www.livejournal.com/users/alternaljournal (fictional, travelling through another world)
Unreachable Star: http://www.unreachablestar.net - Comics & SF News/Reviews/Opinions
This week: My spoiler-free Serenity review
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by BadgersHat:
1) F=MA (Force = Mass x Acceleration--basically the faster an object is moving, and the heavier and denser it is, the louder the crunch when it hits something)
Um, er...
Ok, the formula is correct when considering Newtonian Mechanics. But your interpretation is wrong.
This just means that when an object is accelerating at a greater rate, it'll have a greater force. It says nothing about density or the loudness of the crunch. The thing about the crunch, it is relative to the other object.
You're probably mixing this up with relativistic mass.
http://math.ucr.edu/home/baez/physics/Relativity/SR/mass.html
Quote:
Originally posted by BadgersHat:
2) You can't push a rope.
Well, you could freeze the rope with liquide nitrogen first, then push it
Quote:
Originally posted by BadgersHat:
So, how can we apply these two fundamental principles of physics to the Fireflyverse?
There seems to even be some contradiction in FF with regards to (1).
For example, the gun that the alliance uses does a lot to humans, but won't do a thing to a door.
Or maybe it's just been too long since I watched it and I'm forgeting something.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by thatweirdgirl:
thatweirdgirl with a crush on Michio Kaku
Maybe not after this. He's a mad man (I'm not kidding).
http://www.math.columbia.edu/~woit/blog/
July 13, 2005
"""
Kaku's article is entitled Testing String Theory, and is a thoroughly intellectually dishonest piece of writing,
"""
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I think maybe you're missing the subtle layers of humor in my last statement, dude...
--Jefé The Hat
***************************
--Don't bother trying to predict, figure out, second guess, criticize, or suggest anything that comes from the mind of Joss Whedon, for you shall usually be wrong, and shall find out the Truth and Purpose in due time.
(This is the Truth of Whedoning)
"I like smackin 'em"--Jayne
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by SigmaNunki:
Maybe not after this. He's a mad man (I'm not kidding).
No, I don't want to see it. Ack. Maybe he was high when he wrote that. Well crap.
So, anyone suggest a SANE physicist?
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I understand the need to build speed... but not the need to "push" the entire way. The Voyager and other probes don't worry about the constant consumption of fuel. once the desired speed is reached you let off the gas. Then you try to use gravity wells as a means of slowing down when getting close to your location. For that matter you could also use them to speed up to save more fuel or to change directions.
Come on folks: this isn't rocket sci... nevermind.
When I die I want to go peacefully in my sleep like my grandpa. Not screaming and yelling like everyone else in the car he was driving.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by SigmaNunki:
For example, the gun that the alliance uses does a lot to humans, but won't do a thing to a door.
The guns the alliance uses, to me at least, seem to be sonic based. Sound, no matter how focused, isn't going to do a whole lot to a heavy metal door with a solid lock. Not for a while at least. A human, however, with it's squishy fleshy bits is likely to catch the sonic wave like a sail and go flying back like a plastic bag in the breeze.
--------------------------------------------------------------
Chief Engineer - USS SereniTREE
http://tomeofgrey.blogspot.com
Real Fans Wait - 09/30/05
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ReaverMadness:
In space gravity is severly limited. Tends to act like heavy objects on a water bed. The gravitational influences only go so far.
Actually... the effects of gravity are tremendous in space travel, and extend pretty much forever. Granted, they become less and less as you get farther away from one object or another, but it never stops, and certainly isn't "severely limited." There's a reason nothing, and I do mean NOTHING, travels in a straight line in space. Everything is moving in some kind of orbit or another. Blame gravity
Quote:
Originally posted by ReaverMadness:
There is no "air" in space.
Mostly true. True, enough, anyway, for your purposes.
Quote:
Originally posted by ReaverMadness:
There are solar winds. Though the effects of those are fairly limited.
The effects of solar winds are actually huge, but not on the motion of objects. More on the electronics.
The rest of your post has been fairly well addressed by others, so I won't add to the noise further other than to note that, with any currently understood propuslion system, you'd need more fuel than you have mass to accelerate to any reasonable fraction of the speed of light, and in order to push 1G to the nearest star system, you'd pass the speed of light (which, as far as we know can't even be reached, much less passed) long before you got half way. So you couldn't do it.
Sorry if this post was a bit much, but this is actually one of my areas of expertise. I actually am a rocket scientist...
*************************************************
Is it Christmas?
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
So, anyone suggest a SANE physicist?
I'm a physicist, and I'm sane. Well at least I was last time I checked. You can obsess over me, just don't start stalking me.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by FFFan1:Quote:
Actually... the effects of gravity are tremendous in space travel, and extend pretty much forever.
When you get into the space in between the various and drastically weakened gravity wells begin to sort of cancel each other out.Quote:
The rest of your post has been fairly well addressed by others...
Really? I was talking about maintaining course speed and direction, not really talking about "what speed" or how close it gets to the speed of light.
I go for more of the Sleeper Ship or Generational Ship idea anyway.
Here's a statement for fun:
Not too worried about the "can't go faster than the speed of light" thing either. You can't "go" the speed of light. You can't fly the (exact) speed of sound. If you did you'd break apart. That doesn't stop you from going faster.
The Speed of Dark is faster than the speed of light.
Example:
"Think about how fast a shadow can move. If you project a shadow of your finger using a nearby lamp onto a far away wall and then wag your finger, the shadow will move much faster than your finger. If your finger moves parallel to the wall, the speed will be multiplied by a factor D/d where d is the distance from the lamp to your finger and D is the distance from the lamp to the wall. It can actually be much faster than this if the wall is at some oblique angle. If the wall is very far away the movement of the shadow will be delayed because of the time it takes light to get there but its speed is still amplified by the same ratio. The speed of a shadow is therefore not restricted to be less than the speed of light."
Enough for now... back to work....
When I die I want to go peacefully in my sleep like my grandpa. Not screaming and yelling like everyone else in the car he was driving.NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ColdFusion:
I'm a physicist, and I'm sane.
Interesting how the science threads bring the physicists out of the woodwork...
(Just got my MS in Physics & Astronomy in January)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by FourSkys:
Interesting how the science threads bring the physicists out of the woodwork...
(Just got my MS in Physics & Astronomy in January)
Excellent, if we get enough of us physicists together we can start on a plan to take over the world, after which we can ensure that Firefly is produced again. Whoops, there goes the aformentioned sanity.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ColdFusion:
Excellent, if we get enough of us physicists together we can start on a plan to take over the world, after which we can ensure that Firefly is produced again. Whoops, there goes the aformentioned sanity.
First thing we need to do is build a rope that we can push. That's the first step to any world domination plan. Did someone say something about sanity?
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
OK - three things I know about space/space travel that don't seem to have been mentioned.
1. I don't quite understand the theory, but the closer an obhect gets to the speed of light, the more it weighs - which makes it even harder to pick up speed etc. Don't ask me why - it's true though apparently.
2. Don't see how it'll help, but most of space is made up of dark matter - we can't see it - but it's there, and we know virtually nothing about it.
3. It may be possible to travel through a wormhole (aparently space is curved or something). It may be impossible though, I don't know very much about them.
There we go, thought I'd add my scientific knowledge to the pot of sanity.
Practically sane in every way FLF.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I'm not a physicist, my degree's in computer science.
What we need to do is just find a way to find the universe's source code, then edit in a patch that lets us change our location by lightyears, and then recompile it. Voila, problem solved.
I'm also personally hoping that that whole 'mass approaches to infinity' thing isn't coded well enough, and there's a buffer overrun error we can exploit... once your mass gets too high, it just becomes negative. ;)
Star Pilot Grainger
"Remember, the enemy's gate is down."
LJ: http://www.livejournal.com/users/newnumber6 (real)
http://www.livejournal.com/users/alternaljournal (fictional, travelling through another world)
Unreachable Star: http://www.unreachablestar.net - Comics & SF News/Reviews/Opinions
This week: My spoiler-free Serenity review
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Well, in an attempt to go back to the original point of this thread, let's start by illustrating how these 2 simple concepts (F=M*a and the non-pushability of rope) can be seen in the firefly 'verse:
1) F=M*a:
This is mostly cleaerly seen through Jayne. Jayne is clearly larger than the rest of the crew, and, assuming human beings are all equally dense, he has the most mass, and the biggest M. His acceleration is often controlled by his circumstances, and thus we need to look at some particular situations. Let's investigate "The Train Job". Here, Jayne is seen to fall from a substantial height onto the top of a moving train. This gives him a non-zero a. Large mass * significant a = impressive force. How do we know that the force was impressive? We go back to the ansatz posited by BadgersHat which states more mass and more acceleration yeilds a "louder crunch when it hits something". Thus, since we obviously hear a significantly loud crunch as Jayne falls onto the train, we can clearly see that BadgersHat Rule 1 clearly is applicable and significant in the Firefly 'verse.
2) The pushability of a rope is tricky in this case. At first, I was operating under the assumption that this is false, and a "pushable rope" is somehow responsible for the immense speed and artificial gravity which Serenity is able to create. Though this is, I believe, incorrect. First, we need to define what we mean by a rope. I'll chose as the working definition for this discussion "A rope is a length of flexible organic and/or synthetic material bound is such a way that it is substantially longer than it is wide." There are a number of places where rope is seen. See Jaynestown where rope is used to bundle the cargo hidden behind the bamboo forest and well as used to tie back the Shepard's unusual hair. Many other examples exist. As to the pushability, in no case has any of these "ropes" been successfully pushed. I spent many an hour pondering this question over cup after cup of Earl Grey tea only to come to the conclusion that:
1) If ropes were able to be pushed, surely they would be.
2) Our heros are living "pretty deep in the rough and tumble"*. If an effective means for pushing ropes exist, surely they would be doing it given its obvious implications for usefulness.
Thus, it can only be assumed, since we all know how useful it would be to have pushable ropes (allows the creation of such exotic devices such as fusion generators, non-dairy creamer, the ellusive quad-cycle, hyperspatial expressways, quasi-dimensional fractional statistics, etc.), we can only assume that they cannot, in truth, be pushable. Thus, BadgersHat Rule 2 must be true, merely by virtue that it would be too cool if it were false.
Bibliography
*Wash, in episode Heart of Gold
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by thatweirdgirl:
No, I don't want to see it. Ack. Maybe he was high when he wrote that. Well crap.
So, anyone suggest a SANE physicist?
I may not be a physicist, but I'm into it! That good enough? Since all the others have proven there insanity, I would be proud to take his place
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by TheGreyJedi:Quote:
Originally posted by SigmaNunki:
For example, the gun that the alliance uses does a lot to humans, but won't do a thing to a door.
The guns the alliance uses, to me at least, seem to be sonic based. Sound, no matter how focused, isn't going to do a whole lot to a heavy metal door with a solid lock. Not for a while at least. A human, however, with it's squishy fleshy bits is likely to catch the sonic wave like a sail and go flying back like a plastic bag in the breeze.
Seems to me that force is force no matter what it is projected against. Of course, if it was to shake or somesuch that wouldn't have any effect on a metal door, but a human wouldn't take to well to that. Same with micro-waves.
But, I seem to remember people reacting like they got hit, which means force against. This would make it such that the door would "feel" that same force.
That is unless the people reacting like they go hit is just my mistaken memory.
At any rate, I'm scheduled to re-watch the series over the next little while. *sigh* Way to long since I've watched them.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by fantasticlaughingfairy:
1. I don't quite understand the theory, but the closer an object gets to the speed of light, the more it weighs - which makes it even harder to pick up speed etc. Don't ask me why - it's true though apparently.
Be careful not to mix up weight with mass. As an object picks up speed it gains mass.
Quote:
2. Don't see how it'll help, but most of space is made up of dark matter - we can't see it - but it's there, and we know virtually nothing about it.
The existence of dark matter is far from certain. It's simply a way of making up the difference between the amount of matter/energy that we can see in the universe and the amount of matter/energy that there should be for our universe to behave the way it does. Fourskys would probably know more about this than I, seeing as his specialty is astronomy. (my focus is more towards quantum physics)
Quote:
3. It may be possible to travel through a wormhole (aparently space is curved or something). It may be impossible though, I don't know very much about them.
Who knows? The prevailing theory is that it would require far too much energy to create a decent sized wormhole and keep it open than is practical. Also, in order to keep the wormhole open you'd have to pump it with so much energy that anything you tried to shove through it would be vaporized. But that's all speculation. If the people from 'Sliders' say it's possible, then I'm inclined to believe them.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ColdFusion:
The existence of dark matter is far from certain. It's simply a way of making up the difference between the amount of matter/energy that we can see in the universe and the amount of matter/energy that there should be for our universe to behave the way it does. Fourskys would probably know more about this than I, seeing as his specialty is astronomy. (my focus is more towards quantum physics)
So (one of) the current theory(ies) about Dark Matter is that it likely would reside inside things with mass, but doesn't interact with things other than through the gravitation force (that is, you couldn't see it, that's an electromagnetic reaction). There are arguments for its existence through the rotation curves of galaxies (there appears to be more matter than is visible) and through observations of the cosmic microwave background. The cosmic microwave background is very convincing, and rules out 'normal' dark matter, such as cool stars and planets. This has to be a whole nother beastie all together. Something that, currently, we have no idea what it is.
As for it making up "All of space" that more along the lines of Dark Energy that you're thinking about. Which is completely different as well. Dark Energy makes up and permeates all of space, is EXPECTED (not shown or prooven, mind you) due to the accelerated expansion of the universe.
Both these problems are in the hands of cosmologists and particle physicists now.
Quote:
Originally posted by ColdFusion:
Who knows? The prevailing theory is that it would require far too much energy to create a decent sized wormhole and keep it open than is practical. Also, in order to keep the wormhole open you'd have to pump it with so much energy that anything you tried to shove through it would be vaporized. But that's all speculation. If the people from 'Sliders' say it's possible, then I'm inclined to believe them.
According to general relativity, the only way to get the curvature of spacetime required to create a wormhole is to have a particle with negative energy. Classically, there is no way to do this. Quantum mechanically, however, it is possible to have particles fluctuate to negative energies. But then you have the problem of making enough of them to stay in the negative energy superposition for a long enough time, and blah blah blah, pretty much impossible. On top of that, quantum mechanics and general relativity don't exactly see eye-to-eye, so there are plenty more vagueries where that comes in....
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by FourSkys:
According to general relativity, the only way to get the curvature of spacetime required to create a wormhole is to have a particle with negative energy. Classically, there is no way to do this. Quantum mechanically, however, it is possible to have particles fluctuate to negative energies. But then you have the problem of making enough of them to stay in the negative energy superposition for a long enough time, and blah blah blah, pretty much impossible. On top of that, quantum mechanics and general relativity don't exactly see eye-to-eye, so there are plenty more vagueries where that comes in....
It's been a while since I've done any general relativity, but if I remember correctly, the initial curvature can be created by normal energy/matter but it would need negative energy to hold it open. In either case, the main point of my comment was that this is one of those things that is on the fringe of physics. We don't have proven theories for such realms where both general relativity and quantum theory are applicable, so it's hard to predict what is beyond the next discovery. I certainly won't rule them out, it's good to keep an open mind.
Personally, I think that you can open a wormhole by pushing on a rope.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:Always a good practice. But things like negative energy, exotic matter, wormholes and faster then light travel always seem to be bounded by the requirement of some ridiculously insurmountable wall that ultimately requires some amount of energy equal to or larger then the universe itself. The laws of physics might allow a wormhole to be opened, but any wormhole large enough to serve human practice would, based on the quantum inequalities, require more energy then exists in the known universe.
Originally posted by ColdFusion:
I certainly won't rule them out, it's good to keep an open mind.
There are basically two schools of thought here, either the energy requirement is a product of an incomplete model or it’s real. There are lots of people who accept the incomplete model theory, diligently searching for some new discovery that will usher in the days when we can see past the event horizon. But I think it’s real. Although the model may be incomplete as well, and certainly the failure of quantum theory and relativity to get along may be demonstrative of that, but there is a broader philosophical point here. I think it says that the universe can’t be broken without destroying it. The universe is like a balloon, and you can’t punch a whole through the fabric of space without destroying it.
If you'll allow me to speculate (more then I already have): as our knowledge of the universe grows, I think we will come to understand some day that faster then light travel, whether through wormholes or space-time bubbles may indeed be possible, and maybe, someday even within our grasp. But the universe may not be without a since of irony, because it is entirely possible that if indeed we can someday engineer some monstrous device to manipulate negative energy and create a usable wormhole to wherever, we may do so only once.
Because what we may have created is the ultimate doomsday device.
-------------
Qui desiderat pacem praeparet bellum.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by thatweirdgirl:
....and everything else is magic.
I have a confession. I didn't take physics. It conflicted with something, I don't remember what. It's more of a hobby. Wish I had taken it. When I have trouble understanding an equation or theory, I ask my dad. He's also a hobbyist. Two amateurs with no formal training sit around and talk about physics. I can only imagine how wrong we are! I'm monitoring this thread in hopes of learning something. So be smart!
thatweirdgirl with a crush on Michio Kaku
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
God I love thatweirdgirl
I bet Physics conflicted with Cheerleading Practice
Are you really Cordelia Chase?Or perhaps Harmony?
Remember what LOUIS VUITTON said: "It's in the bag!"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
To the physicists/cosmologists kicking around:
I am currently reading Brian Greene's, "The Fabric of the Cosmos: Space, Time, and the Texture of Reality". I'd like to toss out some topics for your commentary, in order to compare them to 'popular' works like Greene's.
I won't comment on them, because I know there's at least one 'science troll' hereabouts who's just waiting to tell me I'm not a scientist (which I readily admit) and that my opinions and interests on the subject are 'wrong' because I'm not a scientist and could not possibly understand (which I will not concede).
Here are the subjects I'd like some perspective on, if you'd be so kind:
1. String theory and its variants (Greene's a proponent, as is the previously imprecated Kaku).
2. Bohmian 'implicate and explicate orders'.
3. Higgs' fields and energy. (Greene goes to great length describing a non-zero Higgs' field that coalesced during the first 10 to the -36 seconds of the universe to drive the inflationary phase (what he calls an 'inflaton') and the remnant non-zero "Higgs' ocean" that continues to drive the universe's accelerating expansion against the force of gravity (which becomes weaker as the matter becomes increasingly 'spread out'). My question: Are you familiar with this notion? He cites references; but is this a widely held viewpoint? Any other input you may have on the topic.)
4. Do you believe the universe is ultimately holographic and/or n-dimensional?
5. Do you hold to the idea that any 'theory of everything' must invariably be incomplete because we are a part of the system being observed; that is, in order to completely understand a system we would have to be outside of the system under investigation? (It is my understanding that this concept is part of the core concepts of quantum mechanics, particularly the 'Copenhagen' interpretation. Do you believe this tenet to be true?)
I've got other burning questions I'd like to hear from y'all on -- for a more well-rounded informational base, if nothing else -- but, I suspect I've given y'all more than enough to chew on already.
Respectfully,
zoid
P.S.
Do the sheepskinned scientists hereabouts share Sigmanunki's opinion that Kaku is literally a madman? Just wondering. I mean, I know Sagan experimented with LSD and hid that fact for years; but isn't a little craziness just another descriptor for 'human'?
_________________________________________________
"Study your math, kids. Key to the Universe." -Gabriel, The Prophecy
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by SimonSays:
God I love thatweirdgirl
I bet Physics conflicted with Cheerleading Practice
Or perhaps Harmony?
Cheerleader? Maybe band or AP French...It was a while ago. Um, no. Never ever been a cheerleader. Geek. Nerd. Dork. Or perhaps weirdo would better explain it. I have A Brief History of Time on my clie...I read it whenever I'm bored. I admit, I struggled through the third chapter. Bet it gets easier as you go.
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Interesting thing that...
Jayne gets hit and goes flying back a few metres. Looking at it from a conservation of momentum point of view, the guy who fired it should have flown back about the same distance to conserve momentum. Basically, when the alliance guy fired the weapon, it should have pushed him back with the same force that hit Jayne.
Imagine the sonic gun as being like a cannon. You remember what happens to cannons that arent tied down? hehe...
Something like this was on mythbusters a few weeks ago.
Quote:
The Speed of Dark is faster than the speed of light.
Anyone read that book, Speed of Dark? Elizabeth Moon. Its quite nice, about these autistic people that think, well, autistically.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
If we are really keeping our minds open, I think that it's a dis-service to say that wormholes can exist. It would be more appropriate to say that, some theories say that they can, and others say that they can't.
Also, with regards to the faster than light thing. The only thing that is stated is that things can't accelerate to the speed of light. It says nothing about things already at the speed of light and/or beyond. Nor does anything state that there isn't another way to get to speed without acceleration. It's just that that is the only way we know how right now.
That being said, there is nothing to indicate that there is another way to get to speed aside from accelerating.
And what about future theories. We've been proven wrong before.
On a note about me by Zoid. I have seen recent interviews with Kaku and I challenge anyone that is sane to say that Kaku is sane. He is clearly unstable. I will also reference the above provided link. Clearly others think so as well, I
did link to Peter Woit, Columbia University.
On a note about String Theory. It has been around for what 30 years or so, and how many predictions? Any serious theory has to make prediction or else people with be highly critical of it (and rightly so). I'm just surprised that it's taken this long to get some serious critisism against string theory.
String Theory right now (as it's always been) is nothing more that pretty math and philosophy.
My wife (Theoretical Physicist) and I (senior mathematics student) watched Brian Greene's infomercial about string theory. Many things that he stated in that thing was blatenly wrong. ie QM predicts that space-time is "bumpy," it does not. It is nothing more than a pop infomercial for the masses so that they are convinced that it is true so that the String theorists get more funding (which they haven't earned).
A note to Zoid about me being a "science troll." The last time I got on you was because you didn't see reason. I also think that people (more that just Zoid) should stop using the term "troll" so often. Using it in situtations where is doesn't belong (like now) weakens the term for real trolls.
In that thread, I let a lot of things go and tried to explain that you didn't really know what you were talking about and tried to explain why (politely at first) that was so, and the reality of the matters. Some time passed and I thought it
was all done with. Then you started on again spouting the same provably false things (and more) to someone else. Even things that were already proven false.
At this point I was fed up and corrected you; pointing to literature that proved you wrong. You didn't take that well and then threatened me with a body cavity search should I enter your airport with that "attitude" (may I assume you still
hold that postion).
So, if you want to avoid another occurance of that, then just accept when you are wrong gracefully instead of freaking out. ie. When someone with a physics degree (in my wife's case a PhD) and/or is holding an actual text book infront of them quoting page numbers says that you are wrong, accept it, move on (when speaking of physics of course). Don't try to prove you point quoting pop literature.
ie Knowing the mathematics of something is very different than having read a poor explination of something through some pop novel. Not that a lay-man would be able to tell the difference of course.
And I never said that you could not understand, just that you didn't, which was clear and proven. Don't blame me if you can't handle that.
Also, saying that I'm just waiting to tell you that you aren't a scientist...
I'm definitly not waiting to tell you you are wrong or any such thing. BUT, I will not hesitate to tell you you are wrong if you are wrong. Which I hope that others here will tell me I am wrong, if that is the case.
This all of course should come with explination and hopefully accepting grace. Zoid, have you learned this quality yet?
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by ReaverMadness:Quote:
Originally posted by FFFan1:
Actually... the effects of gravity are tremendous in space travel, and extend pretty much forever.
When you get into the space in between the various and drastically weakened gravity wells begin to sort of cancel each other out.
Well... Sort of... But only well outside of a star system (and getting out of our solar system is no mean feat), and even in interstellar space, you're still orbiting around the Galactic Center, being pulled in various directions by other stars, and being accelerated towards the nearest star, etc. Basically, you'd have to plot your course very carefully, and you'd still have to make lots of course corrections.
Quote:Quote:
The rest of your post has been fairly well addressed by others...
Really? I was talking about maintaining course speed and direction, not really talking about "what speed" or how close it gets to the speed of light.
I go for more of the Sleeper Ship or Generational Ship idea anyway.
I didn't mean to say that the rest of your post was wrong or anything like that, just that the ideas you presented had been discussed and expanded on by others. I was responding more to what the others had written than to what you had.
*************************************************
It is, however, somewhat fuzzy on the subject of kneecaps.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:Actually there is a little criterion concerning zero mass. To travel at speed of light something must have zero mass, otherwise momentum becomes infinite at the speed of light. And beyond the speed of light, the mass must be negative. If you assume negative mass is meaningful and extant, then a massive objective simply cannot accelerate (or decelerate) to the speed of light.
Originally posted by SigmaNunki:
Also, with regards to the faster than light thing. The only thing that is stated is that things can't accelerate to the speed of light. It says nothing about things already at the speed of light and/or beyond. Nor does anything state that there isn't another way to get to speed without acceleration. It's just that that is the only way we know how right now.
That being said, there is nothing to indicate that there is another way to get to speed aside from accelerating.
So if you don’t rule out magic, a lot of possibilities open up.
-------------
Qui desiderat pacem praeparet bellum.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
SigmaNunki:
Dude.
I never mentioned you by name (except in the case of Michio Kaku and then not in a way that ridiculed your opinion, but that only sought to find if others agreed with your assessment). Only you and I remember this quarrel and I didn't want to get you started again. I really wanted some honest observations and opinions from the 3 working scientists who I saw were writing on this topic.
Yes, I also saw that you were writing on this topic. I know what your opinions are on science, religion and the topic of zoid. But, I have a burning desire to know what others think on the specific subjects I mentioned, so I risked posting on a thread I knew you were following.
So, I apologize for stating that there was a science troll, and for you self-identifying as the troll. Another man might have neatly sidestepped my ingeniously laid 'trap' by realizing that I hadn't mentioned him by name or directly challenged his views. Now can some one else have a chance to answer my sincere questions without any more of your personal assaults on my integrity? I assure you, I bear you no ill will, and wish only to avoid you to the extent possible. My desire to have absolutely no interaction with you is only outweighed by my interest in the opinions of others on this topic.
Respectfully,
zoid
P.S.
As far as the body cavity search thing goes: Your sig at the time was something along the lines of "You can get a really good cross-section of human mental illness in an airport waiting area -Me" or some such (edited, to be nice). Quoting oneself is (edited, to be nice). I then stated that if I ever saw you (or anyone else for that matter) sitting in my terminal casing the other passengers and wearing a tinfoil hat I'd have airport security body cavity search them. I stand by that statement.
I like your new sig much better. Mr. Rogers, Canada, bricks and Jon Stewart. I think it pretty much sums up your personal philosophy, too. Have a nice life...
P.P.S.
Science is a belief system with its own dogma and sects. I mention this because, what the hell? I'm already in trouble with SigmaNunki. How much worse could it possibly get?
_________________________________________________
"Mercy is the mark of a great man... Guess I'm just a good man... Well, I'm all right." -Capt. Mal Reynolds, "Shindig", Firefly
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Finn mac Cumhal wrote:
Quote:
...So if you don’t rule out magic, a lot of possibilities open up.
And, since no one else has mentioned it, if one were to accelerate a massive body like a spaceship to a significant fraction of the speed of light in order to make an interstellar journey, running into a chunk of pea gravel with the mass of a dime would prove catastrophic, unless the ship were somehow magically shielded from such collisions. Correct?
Would I also be correct in stating that since everything is relative, as one approaches infinite mass while accelerating to c, every other bit of matter one might encounter (even massive particles) could be seen as acquiring infinite mass instead, from the viewpoint of a traveler who felt stationary on the ship? Hence, you really don't want to come into contact with anything on your sub-10,000 year interstellar voyage at near-light velocities, unless one wants to become intimate with the ramifications of the E part of Einstein's equation...
Respectfully,
zoid
P.S.
I know accelerated motion is different from constant velocity motion; but, I think my observation is valid if somewhat improperly worded. I don't like overediting my posts. I was envisioning accelerating to say 2/3 the speed of light and then maintaining that constant velocity until a turnaround and deceleration. I'd speculate that one could not thus begin accelerating in earnest until beyond the Oort cloud, and must needs be appropriately decelerated before reaching the target system's Ooort-like cloud. That's going to make for a long trip in any case (at least 500 years?), unless we find some "magic"...
_________________________________________________
"Sure as I know anything, I know this: I aim to misbehave." -Capt. Mal Reynolds, Serenity, a.k.a. 'the BDM'
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Wow, a lot can happen when one goes to sleep. Let me try to catch up as best I can...
ColdFusion:
You may be right about the wormhole. When I took GR, we didn't talk so much about the creating, only the maintaining. Solving the Einstein equations for a wormhole definitely yeilds a negative energy density, but I'm not sure about actually GETTING there in the first place...
Finn Mac Cumhal:
I'm not so sure I subscribe to the "science will be its own undoing" philosophy you're talking about. But i supposed that that depends onmy mood at the time. It's certainly possible for people to come up with something to exterminate all life on earth, but I tend to hope the universe is better designed than self-implosion if we get too far :-).
Zoid:
I am by no means a String Theorist, and I certainly haven't read the appropriate books to comment well about it. I've heard a few lectures, and a number of seminars on the subject, but that doesn't give me the authority to contradict Brian Greene. But, what I can say, is that I do know a goodly number of other physicists who have seen Brian Greene's show and read his book saying that it's mostly fluff, very hypothetical, and makes it sound a lot more possible and plausible than the mathematics will dictate. As has been mentioned, string thoery is a very pretty mathematical construction, but as for real physics, has made very little progress over the past few years. Possibly more progress than Numerical relativity, but that's another discussion all together.
To the Sigmanunki-Zoid Feud:
Ok, I seem to recall the thread that start this whole thing off, becuase I think I was posting in that one too. (Physics Geeks, Unite!) Let me just say this. Zoid, you can come off as a bit, um, aggressive with some of your posts. I'm not trying to take sides or be beligerent, just calling it as I see it. You don't mean anything by it, but even when you ask questions it can sound like you're attacking the other people...
Zoid II:
You're right, acceleration and speed are different beasts when you're traveling a significant fraction of the speed of light. The universe doesn't get more massive, because acceleration makes things no longer "relative". If you're not accelerating, you have no way of knowing whether you or the rest of space is moving, but when you are accelerating, you are feeling a force (just like if you were in a gravitational field), and that differentiates you from the rest of the universe, therefore only your mass increases. But yes, that still runs into a problem if you hit a pea sized anything, because at that speed, even something small is still likely to do you damage. Also, the Oort cload doesn't have much to do with it. Even in the Oort cloud, the densities of the material out there is quite small. Literally miles upon miles between one rock and the nexk. Granted, this is orders of magnitude more dense than insterstellar space, but still not a really significant issue...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
FourSkys:
Thanks for your replies. By paragraphs:
1. My understanding of wormholes is that we are more likely to create very small temporary ones, than stable ones large enough to travel through. Potential uses for such would include telecommunications.
2. ..."science will be its own undoing": I, as an inhabitant of this planet, am very concerned about the prospect of fusion reactors on Earth. The notion of containing a plasma as hot as the sun within either a magnetic or inertial confinement of Man's manufacture, gives me pause. I'm also not keen on the names 'Shiva' and 'Nova' for an earth-based reactor...
3. So, basically, string theory is mainly popular among authors. This is because it makes no independent predictions which can be experimentally verified; it appears to be a mathematical formulism that agrees with QM without predicting anything new (that can be directly verified) and adds a level of complexity unnecessarily. So, Okham's Razor applies. All correct?
4. Yeah, the feud. It all started when I made an analogy between religion and science (as in my P.P.S. above). Everyone showed me the hate. And I still believe what I said is both logically supportable (as analogies go) and relevant when considering Western society. No offense intended, but I see parallels.
5. Upwards of a trillion cometary nuclei in a spherical shell around our (and possibly every) solar system, none of which are astrogationally plotted would pose a problem in risk analysis for a ship moving at near-light speeds. Launching the ship out of the plane of the ecliptic would avoid most of the matter in our system; but, if http://www.windows.ucar.edu/tour/link=/headline_universe/solar_system/
stories_2004/sedna_planetoid_march2004.html> Sedna truly indicates the existence of an "inner Oort Cloud", the interstice between inner and outer solar system may be relatively small. (NB: Sedna resides at 900 AU; Oort cloud suspected ~50,000 to 100,000 AU.)
Again, thank you for your insights. I truly value them. Do you ever contemplate the implications of your investigations, or are you more of a "just calculate" guy? It seems somehow unnatural to me not to question underlying fundamental frameworks as an article of 'faith'; but, QM says you can't know, so don't bother asking. Yikes.
Respectfully,
zoid
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
1. My understanding of wormholes is that we are more likely to create very small temporary ones, than stable ones large enough to travel through. Potential uses for such would include telecommunications.
While of greater plausibility than transport, I still hold many a reservation. We're just not at the stage where something like that is even remotely possibly...
Quote:
2. ..."science will be its own undoing": I, as an inhabitant of this planet, am very concerned about the prospect of fusion reactors on Earth. The notion of containing a plasma as hot as the sun within either a magnetic or inertial confinement of Man's manufacture, gives me pause. I'm also not keen on the names 'Shiva' and 'Nova' for an earth-based reactor...
So, yeah, having something go wildly wrong witha fusion reactor poses an immense problem. But there are many other ways to destroy most if not all life on earth that are a lot easier and the technology has already been developed. We just haven't done it yet. What can I say, I'm an optomist.
Quote:
3. So, basically, string theory is mainly popular among authors. This is because it makes no independent predictions which can be experimentally verified; it appears to be a mathematical formulism that agrees with QM without predicting anything new (that can be directly verified) and adds a level of complexity unnecessarily. So, Okham's Razor applies. All correct?
I'll agree to that.
Quote:
5. Upwards of a trillion cometary nuclei in a spherical shell around our (and possibly every) solar system, none of which are astrogationally plotted would pose a problem in risk analysis for a ship moving at near-light speeds. Launching the ship out of the plane of the ecliptic would avoid most of the matter in our system; but, if http://www.windows.ucar.edu/tour/link=/headline_universe/solar_system/
stories_2004/sedna_planetoid_march2004.html> Sedna truly indicates the existence of an "inner Oort Cloud", the interstice between inner and outer solar system may be relatively small. (NB: Sedna resides at 900 AU; Oort cloud suspected ~50,000 to 100,000 AU.)
Problematic? Yes. An issue? Sure. But if you could get a spacecraft out that far in a reasonable amount of time, you've already solved problems that are a lot harder than that. We're talking a trillion cometary nuclei, a few miles in diameter, over a spherical shell thats, oh, 4PI*(R1-R2)^2 that's... a really big number. It's not un navigably dense out there...
Quote:
Again, thank you for your insights. I truly value them. Do you ever contemplate the implications of your investigations, or are you more of a "just calculate" guy? It seems somehow unnatural to me not to question underlying fundamental frameworks as an article of 'faith'; but, QM says you can't know, so don't bother asking. Yikes.
So I'm bipolar when it comes to science. I really don't think that religion and science have much to say to each other. Philosophical speculation in many ways can hinder science and gets in the way. You start doing things becuase you expect them, not because the theories and math lead you there. Science really should leave the religion out of it's processes.
That said, I'm a fairly religious person. I belive religion has something to say about everything. But that doesn't mean that I confuse the two. I can contemplate the Truths about existence and stand amazed at the incredible creation that is the world, and philosopically contemplate the end products and goals of scientific persuit. I love to philosophize (took a number of philosophy courses for fun in undergrad). But questioning the underlying framework from that perpsective doesn't lead to good science. It leads to good discussion, good philosophy, but not good science. Philosophy/Religion ask Why, whereas Physics asks How. They're fundamentally different persuits, and I think they should pretty much stay that way...
(granted there are argum
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
FourSkys wrote:
Quote:
...So I'm bipolar when it comes to science. I really don't think that religion and science have much to say to each other. Philosophical speculation in many ways can hinder science and gets in the way. You start doing things becuase you expect them, not because the theories and math lead you there. Science really should leave the religion out of it's processes.
That said, I'm a fairly religious person. I belive religion has something to say about everything. But that doesn't mean that I confuse the two. I can contemplate the Truths about existence and stand amazed at the incredible creation that is the world, and philosopically contemplate the end products and goals of scientific persuit. I love to philosophize (took a number of philosophy courses for fun in undergrad). But questioning the underlying framework from that perpsective doesn't lead to good science. It leads to good discussion, good philosophy, but not good science. Philosophy/Religion ask Why, whereas Physics asks How. They're fundamentally different persuits, and I think they should pretty much stay that way...
My last stab at clarifying my position on this issue: Yes, I am a deist and a Christian. But, I don't expect to find God's handiwork through science. I believe God created the universe and likewise made it a whole puzzle for the mind of Humankind. You will never lift some corner of the universe's 'carpet' and find a tag reading, "Made by God, (c) 4000 B.C. Do not remove under penalty of The Law."
As such, Science is on its own, as are we all. There are no given answers; we must find them on our own or not at all. Hell, maybe there are no answers, only questions and hints.What I was trying to say -- and was soundly spanked for even suggesting it -- is that science is like a religion in that it has basic tenets of 'faith' (things it believes even though these haven't and possibly may never be proven), and uncomfortably coexisting sects (differing schools of thought based on the same principles). I'd like to refer the reader to http://en.wikipedia.org/wiki/Interpretation_of_quantum_mechanics and specifically the section on that page entitled "Comparison". Even though the most commonly believed (there's that word again) 'interpretations' hold the same basic principles to be inviolable, their adherents come to some radically differing conclusions (unless you don't think a single universe v. an infinity of universes is a radical divergence). Likewise, even though most scientists engaging in these endeavors adhere to Dirac's commandment, "Just shut up and calculate", they nonetheless wind up falling into one of these schools of thought; wackiness and occasional name-calling ensues. I cannot help but see a parallel between this and Franciscan v. Dominican v. Benedictine, as one of many examples in religion. And then of course, you have those who adhere to ('believe in') wildly variant fundamental principles, and careers (and research grants) may hang in the balance.
To sum up, I'm not saying science is a religion that replaces God in the mind of scientists, per se; but rather that it has a lot in parallel with religion, in terms of its framework. That was all I was trying to say then (although that discussion escalated beyond reason), and that's all I'm trying to say now. I'm not saying science should try to find God or be somehow informed by a belief in Him. I'm not trying to say Science is trying to replace God. (NB: ...And good luck to It, if It is. Religions have been trying to replace each other for millenia, and we can all see how that's working out.) I do not read my little science books trying to debunk science or find the hand of God in the universe. I read them because I'm genuinely interested in what we as humans know about our universe and our place in it, and what remains to be known and what roads we are taking to get there (I'm also fascinated by the spontaneous generation of complexity, vis-a-vis an explanation of the 'staccato' fossil record). I find it
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
P.S.
As far as the body cavity search thing goes: Your sig at the time was something along the lines of "You can get a really good cross-section of human mental illness in an airport waiting area -Me" or some such (edited, to be nice). Quoting oneself is (edited, to be nice). I then stated that if I ever saw you (or anyone else for that matter) sitting in my terminal casing the other passengers and wearing a tinfoil hat I'd have airport security body cavity search them. I stand by that statement.
If you're going to quote me, then quote me. By stating this I will assume that you don't actually have the quote. And you never stated that "if I ever saw you ..." prefix in your reply to me, you just stated if I ever saw you...
So, if you have time to look up the thread and prove me wrong, go right ahead. I don't have the time to waste.
Quote:
Originally posted by zoid:
I like your new sig much better. Mr. Rogers, Canada, bricks and Jon Stewart. I think it pretty much sums up your personal philosophy, too. Have a nice life...
I find it funny at this point that you are pointing out to me my personal philosophy having never met me nor have you ever really had a meaningful conversation for me. Tad arrogant are we?
So, why don't you enlighten us by what my personal philosophy is? Because, quite frankly, I just found it funny (by the way, I am Canadian).
Quote:
Originally posted by zoid:
P.P.S.
Science is a belief system with its own dogma and sects. I mention this because, what the hell? I'm already in trouble with SigmaNunki. How much worse could it possibly get?
Please read:
http://dictionary.reference.com/search?q=belief%20system
Belief system does not have anything resembling sect (read: orgaization).
Also, in it's colloquial meaning, it does refer to something of a religion. Which we all know that science is definitly not (provable).
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by Finn mac Cumhal:
Actually there is a little criterion concerning zero mass. To travel at speed of light something must have zero mass, otherwise momentum becomes infinite at the speed of light. And beyond the speed of light, the mass must be negative. If you assume negative mass is meaningful and extant, then a massive objective simply cannot accelerate (or decelerate) to the speed of light.
So if you don’t rule out magic, a lot of possibilities open up.
-------------
Qui desiderat pacem praeparet bellum.
I was just not discounting future developments. Things do change radically from time to time.
*sigh* I've spent too much time in pure math. Going to have to refresh my physics.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
@FourSkys:
Also, according to Dr. Greene's infomercial, string theory doesn't allow for wormholes.
I have no doubt that science cannot be its own undoing. It will evolve as it makes new discovers and perhaps in a few centeries, it'll look very different.
I would think that the only part science may play in mankinds undoing, is when some dumbass gets hold of something that they don't understand and mis-uses it. My only hope is that, as a race, when we get far enough when that becomes possible, that we've learned enough that that is highly unlikely.
@Zoid wrote:
"""
but, QM says you can't know, so don't bother asking. Yikes.
"""
I would think that it would be more appropriate to say that we are just coming to start to understand what QM says. Maybe in the next few decades some questions will be answered. But, I would gather that more tougher questions would be added to the list.
And physics is not faith.
From the wife:
QM does not say that you cannot know about the underlying framework, it only places limitations on how much you can know.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Zoid wrote:
"""
Likewise, even though most scientists engaging in these endeavors adhere to Dirac's commandment, "Just shut up and calculate",
"""
In my experience, knowning people pesonally from 3 Universities. Most? No. Some? Yes.
Zoid wrote:
"""
I don't like being told what to think.
So, I'll just stick to reading the available literature and having fun wondering about the universe. Youse guys can have the formalism and 'don't ask questions' ground rules. I couldn't turn off my imagination if I tried.
"""
From the wife:
This is exactly why a lot of people go into the science; because they are questioning things. It's an important part of the scientific culture to question things but on the other hand to know where it makes sense to rely on other peoples results. Knowing the difference and being able to do both is exactly what makes a good scientist. The bad ones are those that never question things.
Applying the formalism to find out more about the universe actually makes it more fun. Reading pop science books is (with very few exceptions) like watching a movie with the sound turned off: you get some vague ideas, you see some pretty pictures, but you don't understand what it's all about.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
SigmaNunki:
Some movement away from the precipice of our dis-communication, perhaps? I welcome that.
You wrote:
Quote:
...Applying the formalism to find out more about the universe actually makes it more fun. Reading pop science books is (with very few exceptions) like watching a movie with the sound turned off: you get some vague ideas, you see some pretty pictures, but you don't understand what it's all about.
...But not everyone can be a physicist. Who would carry away the trash? Who would keep the peace on our streets? Stop our houses from burning down? Keep our skies (and airport terminals
) safe? Go to the jungles of PNG to provide desperately needed medical services? (NB: With a tip o' the tam to minime, whom I'm still sending regular updates of FFFn. Browncoats might consider emailing her sometime. She's terribly isolated. How would you like to be stuck in the boondocks watching 4-year olds die of curable illnesses, with only zoid emailing you? *shiver*)What about the rest of us non-physicists? Should we just mind our own business, if we haven't been schooled with the rod of formalism? Can we lesser humans not wonder and seek knowledge, too? If we ask those who have traveled such paths what they have found along their way, can we only expect to be told that we could never hope to understand?
Maybe so. In which case, perhaps we must settle for a "movie with the sound turned off", or else live in darkness...
Respectfully,
zoid
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by Finn mac Cumhal:Quote:Actually there is a little criterion concerning zero mass. To travel at speed of light something must have zero mass, otherwise momentum becomes infinite at the speed of light. And beyond the speed of light, the mass must be negative. If you assume negative mass is meaningful and extant, then a massive objective simply cannot accelerate (or decelerate) to the speed of light.
Originally posted by SigmaNunki:
Also, with regards to the faster than light thing. The only thing that is stated is that things can't accelerate to the speed of light. It says nothing about things already at the speed of light and/or beyond. Nor does anything state that there isn't another way to get to speed without acceleration. It's just that that is the only way we know how right now.
That being said, there is nothing to indicate that there is another way to get to speed aside from accelerating.
So if you don’t rule out magic, a lot of possibilities open up.
-------------
Qui desiderat pacem praeparet bellum.
Which is why I like my idea. If we can pop into the fourth dimension, we could travel distances along the same position in time. Likewise same position in space, different position in time. Just hope you don't travel to a position in time or space where there's, say, an orbiting planet or star. That'd end your day real quick. At least all that's my little theory. I have no clue what the scientific relevance of the whole thing is. Might all be hogwash. But it would solve the acceleration/zero mass issue.
--------------------------------------------------------------
Chief Engineer - USS SereniTREE
http://tomeofgrey.blogspot.com
Real Fans Wait - 09/30/05
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by StarPilotGrainger:
"Remember, the enemy's gate is down."
Ender's Game RULES! ...yo Grainger, go nova!
I like your idea about constant 1g acceleration, though I'd have to sit down and do the math (after remembering) to figure out how long it would take you to get to any significant speed. As far as your thought of a brief period of freefall: You could simply have your ship make a wide turn using some sort of RCS - without cutting the main drive - until it pointed in the opposite direction. That would eliminate any weightlessness. If you stretched that manouver out over a long enough period of time, the passengers/crew would barely notice the change in direction.
Orbiting a planet would present a difficulty to this method of artificial gravity...with centrifugal/centrepital forces being equal, you're back to freefall. Bah!
(Oh well...freeze your shooting arm, freeze those knees, blast the other toon to pieces!)
"The Killing Sword...The Life-Giving Sword"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
This doesn't have very much to do with any advanced concepts of physics: Just addressing the fuel issue in Firefly (and possible real travel)--- whatever you ultimately discover about propulsion and velocity, it appears to me that Serenity draws all of its power, including life support, from it's engine, which runs on fuel. Direct fuel is always going to be the easiest and most bang-for-your-buck way of powering any motorized vehicle (as opposed to batteries or something else less efficient and reliable) so it seems like a legitimate concern--- at least from a storytelling standpoint, but also probably from a real world perpective as well. If you are building a single craft to perform a single trip in a single direction, then a single launch and stored energy would be groovy. But a Firefly wants to keep flying forever, wherever it wants to go, as well as being a home to those on board. And that means money for gas, baby, however you can get it.
As for velocity and fusion and all the other science, I absolutely love talking about it, and I hope that as long as Firefly/Serenity lives such things NEVER become a part of the story in the ridiuclous ways they have on other sci-fi. I for one am happy to know the engine runs and they use some kind of fuel for it. Including silly psuedo-science just makes stories less and less about real humans living their lives.
God grant me steel to protect the folks I cannot charge,
the cash on hand to charge the folks I can,
and the wisdom to know when to break for it.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
BarkingDoc:
I -- along with many others -- am intrigued by the gravitational aspects of Serenity's (and every other ship in the 'verse?) propulsion and environmental systems. It has been suggested that it's just a convenience to keep the actors from having to deliver lines while floating around the ship, as in every other sci-fi property from Star Trek to Star Wars and beyond.
But the author(s) have gone out of their way to include terms like 'grav boot' when describing Serenity's drive, and in the pilot, Mal and his cohorts are weightless -- as are the crates they are towing -- until they reenter Serenity and close the cargo door, at which time the crates fall to the deck. When Mal and Zoe describe the terraforming efforts on the Rim (again from the pilot), she says, "...All those moons -- just like the central planets, they're as close to Earth-That-Was as we could make 'em: atmosphere, gravity and such, but..." (emphasis mine). Something purposeful is going on as regards artificial gravity, or else the writers -- including JW in the pilot -- are going out of their way to rub our noses in a convenient dramatic device. And the gravity stays on, even when Serenity's drive is disabled ("Out of Gas")...
This is why I always figured Mal's homeworld of Shadow was destroyed by the Alliance simply turning off the planet(oid)'s gravity generator(s). Just let the atmospheric gases explode away from the surface under their own pressure, once the Earth-normal gravity was turned off. That'd be a nasty way for an entire planetoid's ecosystem to die...
Respectfully,
zoid
P.S.
I've always playfully thought the sequels to "Serenity" should be "Shadow" and "Firefly". Did anyone read Joss' post about Summer portraying Kitty Pryde in X3? He mentions the sequels as: "SERENITY II: RICARDO MONTALBAN'S STILL PISSED" ("Wrath of Khan" reference, for the uninitiated) and "SERENITY III: SO VERY NUDE". I definitely like his 3rd idea better than mine...
_________________________________________________
"Burn the land and boil the sea..." -The Ballad of Serenity
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
@zoid:
Dude, you missed my point enitrely (as you have all along).
First off, it was my wife that wrote that, not me. And that was just to say, that we should all know the limitations of what we know/our capabilities/etc. ie I'll never write a great novel, but I probably stand to do some good work in math or physics or...
Second, I never stated that you couldn't know, but that you don't. And I stated this explicitly above. Please read my posts, I don't think that I should have to state this yet again.
Thirdly, I don't expect everyone to be a physicist. Just that they accept that the don't actually know and acknowledge there limitations (which you've yet to actually do).
Asking questions is always a good thing. Giving answers is a good thing as well. It is never bad when knowledge is spead. My problem is when people spread clear dis-information (well, clear to those who know).
Now, I don't expect the average Joe to know that they don't understand if they indeed don't, as they typically don't have someone who actually knows to bounce what they think off of.
But when these people spread what they think (which is wrong) around, that is when I step in (or try to anyway) to correct the situation when I can.
The actual problem comes in when the people that don't know take offense and don't acknowledge that they don't know crying foul and such.
This is my problem with you. In that last thread I proved that you didn't know what you were talking about and you freaked out. You lashed out at me not even taking the time to assimilate the correct information. Which you are actually doing again now in a less agressive fashon than before.
So, ask away. Just don't get pissy when someone proves you wrong/corrects you/etc.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by BarkingDoc:
As for velocity and fusion and all the other science, I absolutely love talking about it, and I hope that as long as Firefly/Serenity lives such things NEVER become a part of the story in the ridiuclous ways they have on other sci-fi. I for one am happy to know the engine runs and they use some kind of fuel for it. Including silly psuedo-science just makes stories less and less about real humans living their lives.
I entirely agree. Leaves a lot of room for story, instead of the inconsistancies that will creep in otherwise.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
The wife found this :
http://physicsmathforums.com/showthread.php?t=56
EDIT: She just told me that it is in the blog of a string theorist.
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by thatweirdgirl:Quote:
Originally posted by SimonSays:
God I love thatweirdgirl
I bet Physics conflicted with Cheerleading Practice
Or perhaps Harmony?
Cheerleader? Maybe band or AP French...It was a while ago. Um, no. Never ever been a cheerleader. Geek. Nerd. Dork. Or perhaps weirdo would better explain it. I have A Brief History of Time on my clie...I read it whenever I'm bored. I admit, I struggled through the third chapter. Bet it gets easier as you go.
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
AP French
, Geek , Nerd , Dork 
....thatweirdgirl will you marry me and have my children? Remember what LOUIS VUITTON said: "It's in the bag!"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
SigmaNunki:
I am hesitant to reply to your latest post. Here's my assessment:
1. I never claimed to be a physicist or scientist of any kind. I never claimed to be a mathematician. I have always and ever been very honest about who I am and what 'paths' I have walked during my chameleon-like existence. I have never claimed expertise in physics. Somehow, you have equated my statements, based on books I have read -- written for laypersons like myself by authors like Einstein, Feynman, Hawking and Greene among many others -- as being authoritative indictments of the scientific community.
2. I only intended to present a speculative viewpoint, hoping to get informed opinions from those who work in scientific and other research careers. I also ventured to comment that the differing viewpoints -- many of which have been duly pointed out by each author I have read -- as well as the fantastic basis of QM, reminded me of religion: 'Believing' in something totally unrelated to everyday experience, and which you have very little hope of ever actually observing (i.e, like 'God'), and then settling into 'interpretation groups' regarding the best guess of what is really going on at the most basic level (i.e., like differing sects of the Protestant faith). I said those things and it made you angry. Are you really so easily offended by a confessed layperson? Have I really so grievously sullied the honor of the scientific community that you personally feel the need to lay me low? If so, the scientific community has a much thinner skin than I had credited. Any similarity I might have envisioned between science and religion stopped well short of righteous anger...
3. As stated above, I get the distinct impression that my layman's viewpoints and commentary make you very angry. Does either of us know precisely why? I certainly do not. Based on what you said in your last post, it's because I haven't admitted that you proved me wrong a year ago. I have no emotional investment in being 'right' or in winning a battle of wills. I've always viewed debate as a sport, and I've been known to switch sides in the middle of the match because I felt the other side had valid points that weren't being made (or just to shake people out of their 'comfort zones'). For me, the value of debate is to fully illuminate all the aspects of a topic, not to come to a consensus or declare a winner/loser. But this isn't a sporting debate as far as you're concerned, is it? It's personal, right?
So here's the only question(s) I have: Is there some way of overcoming our differences? Or are you planning on carrying this grudge forever?
I, for my part, am ashamed that I have failed so miserably with another human being. I am well-known in my career field for being able to forge professional working relationships with people whose personal philosophies are adversarial to my own. (NB: Put two controllers in a room; chances are they are adversarial toward one another. Type 'A' personalities rarely settle comfortably into a pecking order.) I'm not saying we should join each other's fan clubs; but, we should at least be able to share our differing opinions on any topic without resorting to negative behavior of this kind. At least that's my opinion, and I am an expert on being me...
Respectfully,
zoid
P.S.
I don't have much hope that this is gonna succeed; but I had to give it one last try.
_________________________________________________
"We can't solve problems by using the same kind of thinking we used when we created them." -Albert Einstein
(NB: Unfortunately, humans are not very good at 'new' thinking.)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Sigma and Zoid,
How can two people I so thoroughly enjoy communicating with not enjoy communicating with each other? Eh. I am glad the physicists and mathematicians can explain the bits and theories to us non-physicists, It's nice. Folks like Zoid (and me) get our info from sources we think are legitimate scholarly sources. We don't know which theorists the physics community rolls their collective eyes. We rely on folks like Sigma to point us in the more accepted direction. I don't know what happened or when to sour your relationship. I'm not sure it is salvageable. I want you both to know that I value your opinions...loud and aggressive though you both may be at times. 
Anyway, I'm still reading and learning from this thread. Keep up the discussion.
Respectfully,
TiPpY
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by SimonSays:
AP French
I figured out what class it was! It was Latin. I knew it wasn't anything like Calc since the other kids were able to take it. And then I remembered our valedictorian was in French with me, so it wasn't that either. Latin. I waited to take it my senior year because of all the other stupid classes I just HAD to take kept conflicting with Latin. I gave up physics for Latin. (I was planning a Music major at the time...studying root words seemed more relevant.)
I am spoken for.Random info: For some reason my Latin classmates nicknamed Sabine.
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
TiPpY:
Thank you for your kind words. I'd have to agree that there's some unnavigable gulf separating SigmaNunki and myself. The problem is that I like physics, similar to how I like baseball and basketball: I never played (not to the level of techniques, tactics and strategy) those games, but I do have a fan's appreciation of the techniques, tactics and strategies. I like to consider and discuss these topics; but everytime SigmaNunki sees my name on a physics thread, he lays into me. And I'm not going to stop posting simply because someone tells me I should be quiet and let the people with brains talk. I'm too stubborn (mea culpa) and, frankly, that kind of intellectual elitism offends my sensibilities. So, everytime a physics thread comes up, we're going to have this gruesome exchange. Very disappointing for everyone involved, especially the other readers who wanted to read something enlightening, not these embarassingly adolescent exchanges...
On a more serious note, what's this, "I'm spoken for" nonsense? I was planning on leaving my wife and kids for you, you vixen! But then I remembered what I look like, and realized the probability of success for the plan was on the extreme fringe of the scatter chart, so I snuffed the plan. Still, with Feynman's "sum-over-histories" approach ( http://en.wikipedia.org/wiki/Path_integral_formulation ), the electron of my fantasy actually explores all possible paths (including making out with the green chick from the Star Trek TOS pilot) before striking the "zoid loses" phosphor.
In this scenario, "It's the thought that counts", since that's what generates the 'fantasy electron'. And in the case of the 'multiverse' ( http://en.wikipedia.org/wiki/Many-worlds_interpretation ) my 'fantasy electron' actually creates an infinite number of separate universes, one for each possible outcome, so right now, in another universe, I'm making out with Anne Francis (TV's Kitty West and lone female star of "Forbidden Planet"). Every fantasy of mine's got Anne in it somewhere...
Now, perhaps, you can understand why I like physics so much: I'm an incurable hound...
Historically,
zoid
P.S.
Anyone: Quantum mechanics + gravity? Pretty please? Or how about one or two of those predicted but experimentally unobserved (as yet) particles? "Inquiring minds want to know".
_________________________________________________
"Sure as I know anything, I know this: I aim to misbehave." -Capt. Mal Reynolds, Serenity, a.k.a. 'the BDM'
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Ok, so I thought I'd pop back into this thread after about a week of absence. Anyway...
My only real comment on the whole "belief in physics" (mostly becuase I like philosophy, phyiscs, and debating) argument is that they really are two separate things. There is the "Philosophy of Physics" which entails the Many-Worlds theory versus Copenhagen and such, and there the "Mathematics of Physics". The philosophy of physics is primarily the untennable things that are debated and people will adhere to much like a belief system. People will tell you that the Copenhagen interpretation of QM is right or wrong, but there is absolutely no proof either way. Belief? Yes. Like a religion? Um...Sure.
But then there is the mathematics. The math is undeniable. Anybody who starts with the same set of assumptions gets the same set of answers. There are no "belief" systems involved. The math just works. The only possible room for aargument here is in those assupmtions. But there really is no "belief" in the scientific community about those assumptions. Everyone agrees that they are just assumptions, and could be proved wrong at any moment. People publish papers with topics like "what happens if asusmption A is wrong?" It's not a matter of believing in the assumptions, its a matter of making the proper assumptions such that our math reproduces the observed results. Belief? No. Acceptance? Yes. Like a religion? Certainly not.
An example: Scientists don't "believe" (=like a religion) that the speed of light is constant. It can be observed to be the case, at least in our local universe. But there are camps of scientists who think that it may NOT have been constant over the entire history of the universe. It's an assumption in the math that may or may not be right. It's what is used now because it's commonly accepted. It can change, and it'll cause a stir in the scientific community if it does, but show some proof (or a reasonable argument) and you'll sway people over to your side. Religious tennets just don't have that kind of flexibility...
FourSkys
P.S.
"Quantum Mechanics + gravity? Pretty please?"
Good luck with that :-)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Jayne gets hit and goes flying back a few metres. Looking at it from a conservation of momentum point of view, the guy who fired it should have flown back about the same distance to conserve momentum. Basically, when the alliance guy fired the weapon, it should have pushed him back with the same force that hit Jayne.
Imagine the sonic gun as being like a cannon. You remember what happens to cannons that arent tied down? hehe...
Something like this was on mythbusters a few weeks ago.
You're going about this all wrong--you have to assume that what you observe is true, and then deduce why it happens that way. That's the experimental method!
So, how could the gun knock Jayne down, but not push the guy holding it backwards? Obviously, there must be some kind of back-blast. Guys who fire Bazookas don't get knocked backwards at all...
QBeam
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
I like your idea about constant 1g acceleration, though I'd have to sit down and do the math (after remembering) to figure out how long it would take you to get to any significant speed. As far as your thought of a brief period of freefall: You could simply have your ship make a wide turn using some sort of RCS - without cutting the main drive - until it pointed in the opposite direction. That would eliminate any weightlessness. If you stretched that manouver out over a long enough period of time, the passengers/crew would barely notice the change in direction.
I once did the calculation, and discovered that, for a ship that continuously accellerates at 1g, it takes roughly 6 years (subjective) to get anywhere, regardless of how far away it is. It takes about 2.5 years to get to a relativistic speed, and, of course, 2.5 years to slow down again. The year in the middle is enough to travel an effectively infinite distance, since time is essentially stopped for you.
In objective time (an oxymoron, but you know what I mean), you can approximate pretty well using newtownian mechanics. If you approximate 1g as 10m/s, and c as 4*10^8m/s, that means you spend 2*(4*10^7s)--otherwise known as about 1 and 1/4 years--to get to c. You get another 15 months decellerating, so that's a total of 2.5 years at 1/2c, and the rest of the time, obviously, at c. Convert all that to light-years, since that's how we generally think of interstellar distances, and it turns out it takes 2.5 years to go the first 1.25 light years, and 1-for-1 after that. So just take the distance in light years and add 15 months. Easy!
Sadly, I don't think any of this applies to Firefly, because my understanding is all the places Serenity goes are all in the same star system. That means, even at 1g, Serenity never travels far enough to build up relativistic speeds, as far as we know.
QBeam
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by TheGreyJedi:
The guns the alliance uses, to me at least, seem to be sonic based. Sound, no matter how focused, isn't going to do a whole lot to a heavy metal door with a solid lock. Not for a while at least. A human, however, with it's squishy fleshy bits is likely to catch the sonic wave like a sail and go flying back like a plastic bag in the breeze.
Hmph.
The key here is the wide dispersion of the energy. You can see from the distortion in the air that the energy expands in a cone, and strikes the target more or less evenly over an area about a foot in diameter. If you're tackling someone with 100 lbs of force, they'll fly backwards. 100 lbs applied to a steel door isn't going to make it budge (although it might rattle).
You're wrong about "no matter how focussed," though. If you could focus sound well, and you had enough energy behind the blast, you could certainly damage a door. It's all about the amount of force being applied (actually, physicists calculate this type of interaction as an "impulse," not a force, but go ahead and think of it as force). This weapon is designed to stun people, not damage buildings, so the amount of energy delivered is relatively low.
In other news ... don't try to overanalyze the physics of Firefly. *sigh* There's a lot of Hollywood Physics in the series.
Did we establish already the extremely high amount of gravity present in space? It takes an awful lot of energy to accelerate out of the Earth's gravity well, to "escape velocity." It takes even more energy to reach "escape velocity" for our Sun, and tremendous amounts of energy to reach escape velocity for our galaxy. You're just being confused by the fact that gravity moves the ship the exact same way it moves you: you're both falling/orbitting at the same acceleration. You feel pushed when the ship's engines are running because the engines push the ship (changing its velocity), and then the ship has to push you to get you to match its velocity. If gravity is doing all the work, then it reaches through the walls of the ship to move you directly (and even through your body to move your liver directly), so there's no transfer of energy between you and the ship (or between your liver and the muscles in your body).
I'm not a physicist, but I did get my bachelor's degree in physics.
__________________________
"They weren't cows inside. They were waiting to be, but they forgot. Now they see the sky and they remember what they are."
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
One of the best realistic SF solutions to both those problems is to have a ship accelerating at a constant 1G for half the trip, and then decellerate at 1G for the other half, giving the entire spaceship an Earthlike gravity, with Down being the direction the engines are pointed, (although they have a brief period of zero G and readjustment as up becomes down for the rest of the trip). This requires a lot of fuel, however.
Yes--in fact, as someone else pointed out, if you assume rocketary propulsion (i.e. thrust based on expelling mass out the back), you can't carry enough feul to achieve 1g for years on end.
Fortunately, nature has given a potential solution: pick up the feul on the way. Space isn't empty--there are stray hydrogen atoms floating around. The Bussard ram jet is a theoretical way to harness that feul. You create a huge magnetic field to scoop the hydrogen up, like a funnel, then concentrate them in a magnetic bottle at the rear of the ship to kick of a fussion reaction. The only trick is that you have to get the ship moving in the first place, so your hydrogen net can start scooping.
I like to think this is how Serenity works. Remember how the ship starts out slowly, and then there's that big flash at the rear, and the ship suddenly gets a big burst of speed? To me, that looks like the ship starts off with some lower-power propulsion, then kicks on the Bussard field, and POW, you're off.
Apparently, though, they don't have the technology to harness the fussion reaction very well, since, as we know, they need some other kind of fuel for the other ship functions. Apparently, that fuel runs whatever the start-up propulsion is, too. This all still makes a lot of sense to me, because running life support and such would be a tiny power drain, compared to interplanetary thrust at close to 1g. I think they need fuel mostly to start up and stop; during the long cruising periods, they're not using much.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
If you approximate 1g as 10m/s, and c as 4*10^8m/s
Why would you approximate c to that? It's 3x10^8 m/s...
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
Would I also be correct in stating that since everything is relative, as one approaches infinite mass while accelerating to c, every other bit of matter one might encounter (even massive particles) could be seen as acquiring infinite mass instead, from the viewpoint of a traveler who felt stationary on the ship?
I don't think it works that way, no. Your observations are going to be royally screwed by the time dilation, anyway.
You are 100% correct about not wanting to come into contact with anything, though. If you did encounter a pea-sized object, then one of two things would happen: either (1) your ship would transfer enough energy to the pea to make it match your velocity -- all in the course of a billionth of a second, or (2) part of your ship would occupy the same physical location as the pea.
I'm thinking #2 isn't an option. You'd just end up with #1 -- a really, really huge transfer of energy. By way of reference, atomic weapons are a nearly-instantaneous "transfer of energy." And the closer you are to the speed of light, the more energy you need to transfer to that pea to make it match your velocity ... and the less time you have to do it in, from the pea's perspective.
Quote:
Again from Zoid:
I'm also not keen on the names 'Shiva' and 'Nova' for an earth-based reactor...
ROFL!
Just remember: we (the USA) have detonated Fusion devices (for testing purposes). The fears of the atmosphere catching on fire are greatly exaggerated. You also might be interested in [url] http://news.uns.purdue.edu/UNS/html4ever/2005/050712.Xu.fusion.html
__________________________
"They weren't cows inside. They were waiting to be, but they forgot. Now they see the sky and they remember what they are."
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
FourSkys:
Thank you very much for contributing your 'pop-in' explanation. It is very useful for those who might not otherwise understand the distinction between the actual QM and the interpretive 'schools'.
Since I don't want to make statements that others might misinterpret as a claim of expertise, I'll try to phrase the following 'outsider' observations in the form of questions, in order to keep myself out of jeopardy (pun intended). My understanding is that QM predicts the probabilities that an investigated particle will be found to possess certain properties (i.e., position or momentum, spin, et cetera). Correct thus far? QM then predicts the odds that the particle will be found in a specific configuration. (How'm I doing?)
While QM doesn't tell you where each specific electron is going to strike a phosphor (in the classic two-slit example), the results of firing thousands of individual electrons results in a distribution that exactly matches the mathematical prediction. (Or am I misunderstanding or otherwise over/understating this point?) This predictive power makes QM the most successful theory ever devised by Man. (Everybody agrees on this point, so I'm not even going to make that a question.)
The problem is that nobody can say for certain How quantum mechanics works. That's why they call it 'mechanics', right? It's like being in a stranger's kitchen with a recipe for chocolate cake. In the kitchen are bags marked 'A', 'B', 'C' and so on. The recipe says add 2 cups of 'A', 1/2 cup of 'B', etc. When you follow the recipe ('Do the math') you wind up with a perfect chocolate cake. But you have no idea where the individual bags come from, what processes were involved in manufacturing their contents, and there may be some questions about the accuracy of thinking of two different bags of 'A' as being identical. Corollary questions: Are all bags of 'A' really the same bag of 'A'? Is one bag of 'A' actually an infinite stream of identical bags of 'A'? But there is no denying that if you leave the extraneous questions out of it and simply follow the recipe, you will make a perfect cake. (NB: This has been an analogy. Analogies are simplified and imperfect similitudes of the actual process being indirectly examined.)
As you said, the math is undeniably descriptive of a level of reality that is incredibly bizarre when compared to the 'macro' world of our existence (which corresponds more closely with Relativity), and I wouldn't be typing this on a computer were the predictive powers of QM 'untrue'.
Einstein and others -- even practitioners of QM -- were unsettled (would you use that word?) by a theory that didn't include the 'How', and that included uncertainty as a cornerstone ( http://en.wikipedia.org/wiki/Uncertainty_principle , especially the section entitled "Interpretations"). Scientists are humans, too. This unsatisfied need to know the 'How' (please note I never said, 'why'), I believe, has led to the different interpretive groups, including the "Just do the math" school (Copenhagen, right?). Among the many schools/groups -- none of which denies the awesome predictive power of The Math -- there are those that possess a more than a passing resemblance to Eastern religions, in particular. Maybe it had something to do with the '60s, hmmm?
More than the math, I'm fascinated by the picture of reality that QM paints and the human (scientists') reactions to that necessarily blurred picture. As you said, the math is cut and dried. There's no question about it. How the math works and the actual characteristics of reality that underlie the math are the unanswered -- and therefore compelling -- questions for me personally.
Thanks for understanding and -- I'm begging you -- please correct anything I've said that is either incorrect or misleading, not only for myself but for others who might be following this with some interest (like TiPpY). You can even call me an idiotic poser if you'd like, so long as you enumerate specifically wh
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
... ventured to comment that the differing viewpoints -- many of which have been duly pointed out by each author I have read -- as well as the fantastic basis of QM, reminded me of religion: 'Believing' in something totally unrelated to everyday experience, and which you have very little hope of ever actually observing (i.e, like 'God'), and then settling into 'interpretation groups' regarding the best guess of what is really going on at the most basic level (i.e., like differing sects of the Protestant faith).
I think the problem is that we, looking from the inside, can understand how you, looking from the outside, came to the similarity. However, there is a distinct difference between Physics and Religion.
If someone comes to us with an experiment which produces an unexpected result, we all scurry about like insects with the light turned on, and begin revising our theories to come up with something that explains the observed results. We also demand the ability to reproduce the experiment.
If someone goes to the Pope and says, "God told me X," the Pope smiles at him and looks for someone who can help the poor deluded fool.
Religion != Science. That you see a similarity is nice, but it's not appropriate.
__________________________
"They weren't cows inside. They were waiting to be, but they forgot. Now they see the sky and they remember what they are."
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Skydance:
Okay. I don't want to belabor the 'science resembles religion' thing, since it's outlived any usefulness and since the respondents in this thread have made their viewpoints clear (i.e., I'm dead wrong).
But... (*crap*)
It's not historically accurate to say that religion hasn't altered its dogma to match experimental results. It was once canon that the Earth was the center of the Universe and that the Sun, planets and other celestial bodies orbited the Earth. Organized religion vehemently resisted the non-Earth centric paradigm (they burned Dominican friar and astronomer Giordano Bruno at the stake for declaring that there were an infinite number of Earth-like planets orbiting infinite Suns), but The Church eventually changed its 'theory' to match scientific evidence. And that's not the only example of such adaptation. Please note that you and none of your colleagues have been scourged by the Inquisition, other than yearly on or before April 15th...
We now return you to your regularly scheduled programming.
Respectfully,
zoid
P.S.
I really am letting the 'science resembles religion' analogy die. Honestly. I was obviously way off base and unintentionally offended folks by even suggesting it. Next up: How politics are like team sports...
_________________________________________________
"Sure as I know anything, I know this: I aim to misbehave." -Capt. Mal Reynolds, Serenity, a.k.a. 'the BDM'
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
ZOID: I have one more thing to add to the 'sciences as religion' debate.
Yes, poeple who disagreed with the holy roman church were burned at the stake even though now some of those poeple turned out to be right.
None of that has happened in the scientific community, but poeple are being shunned and looked down upon. If someone in the scientific community is openly religious he is often not taken seriously by other scientists.
Although this is not equal to the burning at a stake, it is a modern way of weeding out the poeple who do not fit the standard beliefs. They may agree that each and everyone of their theories are just theories and could be proven wrong at any moment. Just so long as that improvement doesn't include a God.
(My personal obversation of hearing that religion is bad because it was against the scientific community in medival times. Today you might say that those poeple are wrong and science is right but the Inquisition was convinced it was right too).
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
Next up: How politics are like team sports...
*laughs* I think that might be an appropriate followup ....
I'm not sure I agree that the Earth-centric Universe was a matter of Faith, modified because of others coming forth with new information from God (or Angels, or Prophets). It certainly was a belief that was held by the Catholic community, and claims to the contrary were pretty harshly dealt with. Was it a matter of faith, though?
I feel a better analogy would be claiming Jesus never performed any miracles -- and then producing a bible-type document which explained each of those events as a normal event (like, the water-to-wine thing was explained by one of the guests bringing a wagonload of wine as a wedding gift, unbeknownst to the host or to Jesus, and the servants passing it out to the guests). Peter, Luke, et. al. never got that part of the story, so they wrote it the way they had experienced it: with awe and reverance.
Similar physics scenario: a particle physics researcher in India finds that using neutrinos to make observations allows her to measure both the location and momentum of a beta particle, at a level which exceeds Hiesenberg's Uncertainty Principle. Both her results and the experimental process are documented, and other physicists are able to reproduce her work.
Religion is going to discard the gnostic bibles. Science is going to embrace the unexpected experimental results (after a period of healthy skepticism, and reproducing those results), and then race to explain them. These are very different reactions.
The major difference, though, is that Religion is founded on faith. It is based totally on (1) things that happened when no one alive could observe them, and (2) how those things make you feel. Science is based completely on observation. If you ran an experiment, and got results that don't agree with theory, then you need to be able to reproduce that experiment over and over. If you can't do that (and no one else can), then the results don't count. We can believe that something happened, but if we can't reproduce the data you reported, then we can't be certain exactly what did happen. Maybe your test tubes were dirty. [url] http://en.wikipedia.org/wiki/Cold_Fusion#Pons_and_Fleischmann.27s_expe
riment]
Philosophy & differences of opinion occur in Physics when interpreting the implications of experimental results, but the experiment itself determines what we believe in common. If someone has a radical theory, and they can produce an experiment that agrees with their theory but doesn't agree with the other guy ... well. That's why they give out Nobel prizes. Matters of Faith, on the other hand, are not subject to review and verification. By their very nature, they cannot be verified, only believed.
__________________________
"They weren't cows inside. They were waiting to be, but they forgot. Now they see the sky and they remember what they are."
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Zoid,
So what you said made sense, and, to the best of my knowledge, was correct. The Cake analogy fits, too, to some extent. Scientists for the most part don't know how QM works. "Spooky action at a distance" and the like. There are unresolved problems and things that have yet to have their "how" explained. Like how an electron really isn't anywhere until you look at it. It's entirely meaningless to us non-quantum mechanical beings. At this point, the only way to truely describe the "how" is to resort to math. But really, on a fundamental level, everything gets reduced to that at some point. For example: How does the earth move around the sun? Well, the sun warps the fabric of space-time around is according to its mass, and the earth follows the trajectory. How does the sun warp spacetime? It's a property of mass such that it does. But How? Good question. We can go into gravitons and things, but the questions is always answered with another how. Yay, don't you just love infinite loops?
Quote:
Originally posted by zoid:
P.P.S.
Someone else want to tackle the reason why individual electrons fired through a two-slit screen build up a QM-predicted interference pattern? I've said enough crazy things before lunch today (obscure reference intended). For the readers: It has to do with Feynman's sum-over-histories. You're gonna love this.
Nah, I'll pass on that one :-)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Why would you approximate c to that? It's 3x10^8 m/s...
So true... many a slip, 'twixt the the mind and the lip, I suppose.
To be more precise, it's 2.998, and I usually approximate that at 3.000. I'd recommend using that figure here, too...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
While QM doesn't tell you where each specific electron is going to strike a phosphor (in the classic two-slit example), the results of firing thousands of individual electrons results in a distribution that exactly matches the mathematical prediction. (Or am I misunderstanding or otherwise over/understating this point?) This predictive power makes QM the most successful theory ever devised by Man. (Everybody agrees on this point, so I'm not even going to make that a question.)
...
As you said, the math is undeniably descriptive of a level of reality that is incredibly bizarre when compared to the 'macro' world of our existence (which corresponds more closely with Relativity), and I wouldn't be typing this on a computer were the predictive powers of QM 'untrue'.
So far, so good. What you may not realize, though, is that Relativity is the second most successful theory in human history, judged by that same imperical standard. What's facinating about that fact is that, as far as we know so far, there is no way for both QM and Relativity to both be correct.
Quote:
Thanks for understanding and -- I'm begging you -- please correct anything I've said that is either incorrect or misleading, not only for myself but for others who might be following this with some interest (like TiPpY). You can even call me an idiotic poser if you'd like, so long as you enumerate specifically where I've gotten it wrong. I'm seeking deeper understanding and a greater depth of perspective, which can only be gotten from honest and unafraid discussion with others ...
I certainly don't see anything wrong, as far as it goes. The odd thing is, when I learned this stuff in undergraduate school, the missing "how" did bug me. Somewhere along the line, I've discovered, it stopped. My new theory is that we really don't have as much of an emotional need for knowing "how" as we think we do. Rather, what we need is a sense of being right. The only reason we care about "hows" is because it helps us cope when we learn that what we thought was true is not. Whenever science presents us with an observed fact that we would not have anticipated, learning how that happened returns us to a sense of security, I think.
Back in undergraduate school, I think I lost that need for "how" completely. I spent a lot of time explaining QM and Relativity both to my peers in other disciplins, and I got a lot of "how comes." Often, my answer was just "because that's how the universe is, as it turns out." I mean, once you learn that the value of pi is irrational because it was randomly determined during the big bang (and all randomly determined numbers are irrational, because irrational numbers are dense in the real number field), there's not much left that can't be satisfactorily answered that way. Sometimes it turns out that effects to have causes, and it's fun to investigate those cause-effect chains. But it's just the nature of logic that, if you follow the chain far enough, you eventually come to the end--the effect without a cause. The first time or two, that's unsettling, but you get used to it.
P.S. You also need to keep an open mind. It's also the nature of science that, sometimes, everything you think you know turns out to be wrong. However successful QM and GR are, tomorrow they could still be proved totally wrong.
P.P.S. My favorite recent example of the unexpected observed fact are the macroscopic quantum effects seen in the gravity wave studies. They've been measuring the momentum of some gravity wave detectors to such ludicrous levels of accuracy that their position has become uncertain, on a macroscopic scale. I first heard a talk about it at IU when I was in grad school, before they'd done it. It was a popular subject of speculation: what on earth would something like that look like, to the naked eye. I mean, measuring photons in electron cascade devices is a pretty concrete physical event, but let's face it, it still FEELS about the same as an experiment in a computer generated alternate reality. It
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
To all:
Thank you very much for providing your perspectives. Since the conversation seems to be getting more 'normalized' I'm tempted to just sit back and let y'all 'riff'. Please don't stop. I've got a blender full of margueritas and it's 'birthday week' at my house...
To QBeam:
Yeah, I was aware of the successes of Relativity. As tough as it might have been for some classical Newtonians to accept at the time, the theory has a certain, "Doh! How could we have not seen that?" quality to it. Very aesthetically pleasing and the fact that it may be summed up so simply (i.e., E=mc², or as originally written, "m = L/c²") adds to its beauty. Correct me if this is mistaken, but I've read that GR has become a model for physical laws, because of this attribute of simplicity. There is some expectation that the fundamental laws of the universe will ultimately be found to be simply elegant.
The fact that the greatest minds of our and previous generations have been questing for TOEs and GUTs has not escaped my attention, either. The problem, as you stated, is that while QM and GR are remarkably successful, they are also mutually incompatible. I'm betting that neither framework is wrong, per se, but that both are subsets of a larger, as yet undiscovered framework, similar to the way that Newtonian mechanics is not wrong, it's just not as complete as Einsteinian Relativity. To clarify and avoid trouble: I've read that Newtonian physics is a functional subset of Relativity.
The gambling man in me says that neither of the apparently incompatible theories of the very small and the very large is wrong, just that they are both part of something larger. The gambler also says y'all are going to find it, hopefully in my lifetime. I think that'll be a special day...
But speaking of the incompatibility of QM and GR, here's a genuine question in my mind, the answer to which I haven't a clue: Has anyone got a firm idea or even an approximate guess as to when the changeover occurs, wherein QM effects stop being the rule and GR takes precedence? I reckon it's got to be larger than an atom (since you still get 'quantum leaps' in the electron shell) and yet smaller than the "Planck mass" (roughly put, about the mass of an amoeba or "some fleas" according to Wikipedia, which is definitely in the realm of the directly observable). So does anybody have information about the precise changeover point?
Your 'P.P.S' only makes this question more beguiling, since you reported QM effects may -- under the right circumstances -- be writ large enough to be viewed with the naked eye. And you actually observed the superposition(?) of the detector yourself?! Could you take me to work with you someday? I'd give a lot to see that.
Are there any write-ups on the phenomenon available on the web? When you say "gravity wave detectors" do you mean as in LIGO or GEO 600? Are the detectors themselves integral to the experiment or just handy objects near a laser interferometer? Is any of this work related to Raymond Chiao's proposed EM radiation-to-gravitational radiation conversion apparatus, or did that whole thing turn out to be snake oil? I have so many questions! Just give me an effective search term, if not an actual link...
Adding your observation to the 'changeover point' question, has anybody begun thinking about what mechanism caused the quantum effect to be extended to a human scale? Is it simply because the detector was so precisely measured in one of two corresponding attributes, that the other (position, in this case) necessarily became more uncertain? What would happen if human observers were thus measured; would using conscious observers as the subjects of the precision measurement change the results in any way, and I wonder what they would see, should they begin to become 'fuzzy' in position like the detector? I hereby request more data...
Respectfully,
zoid
P.S.
What would happen if you put Schrödinger's cat inside the gravitational wave detector? :sm
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
@Zoid:
Know what, I wrote this long elaborate post explaining, blah, blah, blah. But, 
it, I have no interest in trying to explain something that will be mis-interpreted... again. I really think that you think you know what I'm about (and are quite off the mark BTW) and read that into what I write instead of reading what I write (yes, I'm guilty of this from time to time as well).
So, I'll just state it simply.
If you are so inclined re-read my posts, you are definitly reading something that isn't there.
I also must note that in the last thread you did (by implication) presume authority (and explicitly after that). Before that, we go along.
This alone should tell you that we can get along and what pushes my buttons.
Also, all my posts regarding your behaviour primarily reference that other thread. If you continue asking questions as you have here (minus the passive aggressive holeness), we'll get along fine. With the holeness, expect people (not just me) to behave offended/irritated/etc from time to time. Act as in the last thread, expect problems as in the last thread. ie To expect different results from the same behaviour is insane.
That is all that I have to say about that. Hopefully it has been put to rest.
Zoid wrote:
"""
Or how about one or two of those predicted but experimentally unobserved (as yet) particles? "Inquiring minds want to know".
"""
The colliders are being built as we speak that will help answer that (ie CERN and I think that Fermi Lab is as well.). At least, as far as I know they're still being built. Never know with the gov's today.
Daikath wrote:
"""
If someone in the scientific community is openly religious he is often not taken seriously
by other scientists.
"""
I don't know what you've heard but I've never heard anything of the sort; neither has the wife. Any examples?
----
"Canada being mad at you is like Mr. Rogers throwing a brick through your window." -Jon Stewart, The Daily Show
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
Very aesthetically pleasing and the fact that it may be summed up so simply (i.e., E=mc², or as originally written, "m = L/c²") adds to its beauty..
E=mc^2 is, in Einstein's words (man I hope this quote is right...) "the most important upshot of the special theory of relativity". The equation is not a 'summing up' of special rel.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Your 'P.P.S' only makes this question more beguiling, since you reported QM effects may -- under the right circumstances -- be writ large enough to be viewed with the naked eye. And you actually observed the superposition(?) of the detector yourself?! Could you take me to work with you someday? I'd give a lot to see that.
Sorry, I don't work in that lab, either; my report is second-hand. Actually, I first heard this described in a talk by a panel that was on CSPAN, or CSPAN2, I don't remember which. I was rivetted, since, like I said, I'd heard that they'd expected to be able to observe macroscopic QM effects at the talk at IU.
Quote:
Adding your observation to the 'changeover point' question, has anybody begun thinking about what mechanism caused the quantum effect to be extended to a human scale? Is it simply because the detector was so precisely measured in one of two corresponding attributes, that the other (position, in this case) necessarily became more uncertain? What would happen if human observers were thus measured; would using conscious observers as the subjects of the precision measurement change the results in any way, and I wonder what they would see, should they begin to become 'fuzzy' in position like the detector? I hereby request more data...
Yeah, it sounds to me like you're thinking of the "changeover point" incorrectly. It's not like there are two different physical realms, in which two different sets of laws apply. There's no arbitrary line dividing "large" and "small."
Rather, I suggesting thinking of it as another example like the wave/particle duality of light. When you run certain kinds of tests, light acts like it's made up of particles. When you run other kinds of tests, it acts like it's waves. The truth is, neither is entirely correct--they're just both different aspects of light's true nature. Those tests are interesting because they appear to filter out one of those aspects, but it doesn't mean that other aspect doesn't still exist. The metaphore I use when I give talks to humanities-type groups is to consider your house. If you stand outside at the curb and look, you see one thing. If you go inside and look around, you see something that looks completely different. If you showed some person who'd never seen any kind of building before two photos, one from the curb, and one from sitting on your couch, it might be hard for him to concieve that he was seeing pictures of the same thing, right? But because you understand so much more about the true nature of your house, it makes sense to you--you're just seeing two different aspects of something that's really far more complex than either picture reveals.
I expect that QM and GR are exactly like that. QM problems, like interferometry problems, are designed to observe one aspect of the behavior of mass and energy, and to filter out the other. And vice versa. Both are equally true at all times, and in all circumstances. Just like when you're standing at the curb, looking at your house, that other view from your couch is still there--you're just not seeing it, at that moment, because the limitations of the human mind restrict you to one perspective at a time.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I'm somewhat leery of entering this fray, but there is definately something facinating about the difference in the perspectives on "science" that you and Zoid are expressing. So here goes.
Anyone who thinks that science isn't totally immersed in faith and irrational belief is profoundly confused. "Science" is merely a certain way of answering questions, and scientists are just a group of people who treat that method as the correct way of answering at least one set of questions. It is a peculiar feature of our civilization today that most people believe that "science" gives "knowledge," and everything else you think you know is just "belief."
The trouble is, the scientific method is horribly constrained. Human beings simply cannot get by in this world, without accepting many, many things without insisting on scientific verification. Its an interesting thought-problem. How many things do you take on faith each day, before you even make it into the lab (or whereever you go to do your job)?
Anyway, I quickly learned that, as a sub-culture, scientists are every bit as prone to irrational assumptions and emotional attachment to ideas as anyone else. In fact, they might be worse than average, because they tend to be skilled at rationalizing. I think I first started to figure this out my senior year in undergraduate school. I was taking a seminar called "current topics in physics," and I had to prepare a talk on the hole in the ozone layer. So off I went to talk to various lab groups who were doing research on the subject. To get me started, I had a specific question in mind: "If CFCs emitted by man are the principle cause of ozone depletion, why is there a hole in the southern hemisphere, but not in the northern hemisphere?" After all, something like 95% of human CFC use was concentrated in the northern hemisphere, and, for the most part, air from one hemisphere doesn't mix with air from the other. I figured this was such a basic problem for the whole field that there would be a simple, well-known answer. I was wrong--lab after lab, no one had any idea. In model after model, everyone just assumed that human emissions were spread evenly between the two hemispheres. Bizarrely, no one seemed to think this was a problem.
Lesson number two came quickly thereafter, when I found out that the reason there were so many lab groups doing one type of research or another was that the easiest way to get federal funding for your project was if the word "ozone" appeared in the title of your proposal. To make a long story short, I discovered that a whole lot of the scientists I was interviewing were simply adopting on faith a position that was not just unproved, but that appeared to be false, based on the best evidence at the time, for the very human reason that doing so made it a lot easier to get paid. It was quite disillusioning, but heck, I couldn't even blame them.
And here's another interesting data point. The vast majority of my physics professors have been devout Christians. This was in stark contrast to my profs in other scientific disciplins--especially biology/chemistry, which was nearly uniformly populated with bitter atheists.
And you better believe that those biologists/boichemists/chemists' emotional investment in their atheism influenced their scientific reasoning. I can't tell you how many times I heard one of these types pontificating about how Christianity was foolish, because they could completely explain the origin of species through evolution. For those who've never considered this argument (how is that possible?), there are two problems with this argument. Firstly, only a specific sub-faction of Christians believe in creationism, and only some of them think it's an important part of Christianity. Secondly, and more amusingly, it's simply not the case that evolutionary science can (at least yet) explain the origin of species. There are several practical problems (such as irreducible complexity), that we don't fully understand yet. Consequently, if you believe that evoluti
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
So let me pull all this together in a thesis. I think Zoid has made a valid point, by identifying different factions of scientists. The nature of science appears to be such that we always have more questions than answers. And the idea that science is all about deductive reasoning is a fiction that results from focusing only on the part of science that gets published in the finished papers. The truth is, the most important part of what happens in science is what happens before the experiment ever gets run. Because there's never enough time or money to test every hypothesis, those scarce resources get allocated according to what the scientists collectively believe will be most fruitful--in other words, based on unscientific guesses. Finally, for reasons that are obvious, I expect, when scientists talk to each other, or to non-scientists about their community, they're usually talking about those non-scientific guesses, because they are emotionally invested in their particular favority guesses. After all, people don't waste time talking about things they don't care about.
I disagree with a lot of your conclusions here.
First, the things that I do agree with. Yes, scientific funding is very important (work can't continue without the money), and often times scientists will use the "popular" and "sexy" buzz words which makes things sound exciting. But just becuase they sell their work with them, doens't mean they dominate the scientific method that they'll be using. "Mention ozone and you'll get money." It's true, but its mostly jaded and a little misleading. It's not like their work has no effect on what they're selling, it just may not be "significant" in the vein that most people think. Yes, there's a significant bit of marketing going on, it stinks, but unfortunately, there's still a whole lot of politics involved.
But, it's, in my opinion, "what happens before the experiments get run" is certainly not the most important part. What gets decided upon for future research projects really isn't based on "non-scientific guesses". Just the opposite. There's so much fighting over funding, you really can only get money to look at something that you're absolutely assured of seeing. In fact, most people end up doing a good deal of the work before they put in the grant and experiment proposals, just so they can show good cause that it's worth the investor's money. Additionally, while the actual money is handed out by people who know nothing about science, there are many many committees whose sole job it is to look at the scientific validity of their propositions. If they were based on "non-scientific guesses", they wouldn't be funded. (Insert quip/argument for/against string theory here).
And sure, while scientists may be emotionally involved in their own hunches and beliefs about where science should go yet, if there was a clear and decisive evidence as to the next obvious option, the opposition wouldn't get the money. This has happened to people in the past. The other groups either adapt or fade away. You certainly have to pick a direction and run with it, and often times you really want yor theory to pan out. But doing this is really just putting all your eggs in one basket, and Darwin assured us that that's likely to kill off half the species...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
Rather, I suggesting thinking of it as another example like the wave/particle duality of light. When you run certain kinds of tests, light acts like it's made up of particles. When you run other kinds of tests, it acts like it's waves. The truth is, neither is entirely correct--they're just both different aspects of light's true nature.
It's not just 'like' the wave/particle duality of light, it IS wave/particle duality. Particles like electrons have associated wavelengths, just as photons have associated momenta. The 'changeover' (if you want to call it that) occurs when the particle in question is so massive that its associated wavelength is too small for us to perceive its wave-like properties.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
But, it's, in my opinion, "what happens before the experiments get run" is certainly not the most important part. What gets decided upon for future research projects really isn't based on "non-scientific guesses". Just the opposite. There's so much fighting over funding, you really can only get money to look at something that you're absolutely assured of seeing. In fact, most people end up doing a good deal of the work before they put in the grant and experiment proposals, just so they can show good cause that it's worth the investor's money. Additionally, while the actual money is handed out by people who know nothing about science, there are many many committees whose sole job it is to look at the scientific validity of their propositions. If they were based on "non-scientific guesses", they wouldn't be funded. (Insert quip/argument for/against string theory here).
I'm afraid I don't agree. Yes, much money gets cycled through scientific review committees. But I have no idea why you think this means that they won't fund research based on unscientific guesses. As I said, scientists often formulate their opinions based on unscientific guesses.
Let me give you a concrete example, to illustrate my point. (No sense talking past each other.) Consider the research grants that were proposed for SIS/UBS in the mid 90s. SIS and UBS (and a few other material) are a natural tissue graft material that is derived from internal organs, usually pigs. In a nutshell, you get rid of the cellular parts, and keep the collagenous part in as close to its native state as possible. The original idea (in the late 80s) was to use it to make artificial blood vessels to replace blocked or damages ones. In the 90s, researchers at Purdue got the idea of using it as a wound dressing. Their preliminary results showed that it actually induced healing. But for years, scientific review boards refused funding, for the simple--and highly unscientific--reason that people who'd never tried it would not believe that it was possible.
So there it is: funding decisions being made on purely unscientific guesswork. It's not even like they didn't have access to the preliminary data that showed it worked. They just chose to believe that the data was more likely faked or anomolous, rather than consider the possibility that you could heal a diabetic ulcer with pig guts.
The ozone problem I described is another example, of course. The whole field of global climate change has degerated into pseudoscience, because of the huge emotional investment of just about everybody involved, on both sides.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
It's not just 'like' the wave/particle duality of light, it IS wave/particle duality. Particles like electrons have associated wavelengths, just as photons have associated momenta. The 'changeover' (if you want to call it that) occurs when the particle in question is so massive that its associated wavelength is too small for us to perceive its wave-like properties.
Ha! Good point.
In fact, that's kinda what I'm saying. It's not too hard to get your mind around this peculiarity in the case of photons. Or maybe its just that we grow up being trained to understand and accept it. (How old were you the first time the wave/particle duality was explained to you?) The question is, will the rest of the universe turn out to be equally comprehensible? I expect that it will. (My completely unscientific opinion, based on preference for believing the universe is elegant.)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
How old were you the first time the wave/particle duality was explained to you?
17 if I remember correctly. I was damn excited too, although I suspect I didn't quite grasp it at the time.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Quote:
--------------------------------------------------------------------------------
Originally posted by QBeam:
How old were you the first time the wave/particle duality was explained to you?
--------------------------------------------------------------------------------
17 if I remember correctly. I was damn excited too, although I suspect I didn't quite grasp it at the time.
Really? That old? I think I first learned it in 4th grade. It's such an important part of what drove our 20th Century history, I thought they taught it to everyone around then, any more. Well, maybe my thesis is flawed...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
So there it is: funding decisions being made on purely unscientific guesswork.
Ok, so here's my counter-example to your counter-example (using things which I am much more familiar with):
LIGO, the American gravitational wave detector. This is an experiment that has cost millions (billions? I'm not sure of the numbers) of dollars, and took funding away from quite a few other research programs (which many people were unhappy about). Now, the only reason something like this could get funded is if there is very very solid evidence that something can be detected AND that it provides a significant advancement to the scientific community. If gravitational waves were not such an important facet to new fronteirs of physics, if there were already EXTREMELY strong indirect evidence for their existence ( http://nobelprize.org/physics/laureates/1993/presentation-speech.html), it never would have gotten funding.
Second, space-based telescopes. In order to get funding to build things like the Chandra X-Ray telescope, you can't just "expect" to see something. There were decades of high-altitude ballon born tests to try to detect X-ray from space. The early missions were based mostly on hunches, but there was also reasonably scientific guesses behind them. It's not just an "I wonder if...", it's a "well, my calculations show the temperatures to be high enough, could that mean...?" And then, after decades of studies and proof that something might be seen, there is another decade of planning and plotting (possibly scheming) that goes into making sure the thing will be able to see what is expected. The budget's are small at first, a few peple with budgets to plan and determine the plausibility of the experiment, and then start to grow if it proves worthwhile. There really is no place for nonscientific guesswork.
As to your example, if there was well documented, tested proof that this could work, I can't see there not being funding for it. Sometimes you just don't get lucky and there's not enough funding to go around. Politics gets in the way, funding troubles get in the way. If that's what you consider "nonscientific", then OK, but by "nonscientific" I generally think more along the lines of astrology or whiney teenagers...
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
FourSkys and QBeam:
(*zoid, who has been sweeping the hallway outside, hears a debate and pokes his head into the room, clears his throat*)
'Scuse me gents...
From a standpoint of logical debate, FourSkys counter-example is not particularly applicable. QBeam gave examples of funding decisions being made on purely unscientific guesswork. He never said "all funding decisions...", he said "some". Therefore, counter-examples do not disprove his assertion.
Analogy: QBeam has argued that some apples are green. FourSkys then produces a red apple in order to disprove QBeam's assertion. While it was never given that "most apples are red", the use of the term "some" indicates that green apples are a subset of all possible apples, which may in fact include a vast majority of red apples, and doesn't rule out the occasional yellow apple.
So, if he had stated that all scientific funding was based on unscientific guesswork, then FourSkys counter-example would have been a valid disproof. As it stands, the only way to disprove QBeam's assertion is to prove he's lying/misrepresenting about his examples, analogously 'painting a red apple green'.
I, as a taxpayer, would certainly hope that a significant fraction of NSF funding is going to projects that are based on 'good science'.
(*zoid changes the liner in the wastebasket and then pushes his cart out the door*)
v/r,
-zed
P.S.
LIGO's price tag, according to http://en.wikipedia.org/wiki/LIGO is $365M. I read at a subsidiary link (I think it was BBC) that the team is requesting another $150M. More amazingly, they expect to be able to measure a GW-induced distortion equal to 1000th of the size of a proton... (If they can keep passing semis from jiggling the apparatus.)
___________________________________________
"The only real valuable thing is intuition." -Albert Einstein
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:Quote:
Quote:
--------------------------------------------------------------------------------
Originally posted by QBeam:
How old were you the first time the wave/particle duality was explained to you?
--------------------------------------------------------------------------------
17 if I remember correctly. I was damn excited too, although I suspect I didn't quite grasp it at the time.
Really? That old? I think I first learned it in 4th grade. It's such an important part of what drove our 20th Century history, I thought they taught it to everyone around then, any more. Well, maybe my thesis is flawed...
Well I don't know what 4th grade equates to (I'm in Scotland) but our physics program (I had physics right through school for 6 years) advanced steadily through 'conventional' topics until the final two years when we started looking at duality and more interesting stuff. Personally I would have loved to have had that stuff earlier on, but the fact is that it's relevant only to the tiny number of students who will go on to study in more detail.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Grounded wrote:
Quote:
...Well I don't know what 4th grade equates to (I'm in Scotland) but our physics program (I had physics right through school for 6 years) advanced steadily through 'conventional' topics until the final two years when we started looking at duality and more interesting stuff. Personally I would have loved to have had that stuff earlier on, but the fact is that it's relevant only to the tiny number of students who will go on to study in more detail.
Born in the Summer of 1958, I was in the 4th grade at the age of nine. They were still using balloons and fruit to illustrate math problems. Then, in the following year, we learned the long division. If they'd tried to teach us wave/particle duality at that point, I'd've sh*t myself...
QBeam's school must've been one of those in which they gather the cream of the scholastic crop and accelerate their learning. Kinda like The Academy, in Firefly.
Can't stop the signal...
v/r,
-zed
_________________________________________________
"Also? I can kill you with my brain." -
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by zoid:
Born in the Summer of 1958, I was in the 4th grade at the age of nine. They were still using balloons and fruit to illustrate math problems. Then, in the following year, we learned the long division. If they'd tried to teach us wave/particle duality at that point, I'd've sh*t myself...
QBeam's school must've been one of those in which they gather the cream of the scholastic crop and accelerate their learning. Kinda like The Academy, in Firefly.
Can't stop the signal...
v/r,
-zed
Nine? QBeam...you have to be kidding.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
4th grade sounds about right. We were taught the basic concept, we may not have understood it. Keep in mind that it's just an introduction. Kids that age don't fully grasp the concept yet, they're still trying to make it fit into their world of physics. Children's physics is based on their concrete observations. A ten-year-old is in the concrete operational stage of cognitive development. They are not typically able to think in the abstract. In addition, they haven't yet formed a solid basis in math and science to build a deeper understanding of wave/particle light.
Just wanted you all to know I am still reading and learning from this thread. Please continue. If I can formulate a question, I will, but right now I'm barely keeping my head above water.
www.thatweirdgirl.com
---
"...turn right at the corner then skip two blocks...no, SKIP, the hopping-like thing kids do...Why? Why not?"
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I'm still astounded that anyone would be taught this sort of stuff at age nine. In primary school (7 years of school before high school - I guess this would equate to junior high?) we did almost no physics that I can recall. I don't see how you can even touch on wpd without already having a solid basis in the subject.
NOTIFY: N | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I've just finished reading this thread from top to bottom; and never having had Physics at any level (unless they snuck some in when I wasn't looking) the only thing I am qualified to say is Zoid, Anne Francis played "Honey West", not "Kitty West".
In spite of the fact that it hurts my brain, this thread has been fascinating. Keep it up.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
First, sorry for the long post. I've been busy and am catching up.
@QBEAM:
On your "thesis."
Yes, science has more questions than answers and I don't really see that changing anytime soon. With every answer there always seems to be more than one question coming up with it. It does seem to be a never ending process.
You state that the direction of science is based on unscientific guesses. This couldn't be more false. The scientific guesses are based on previous science and what direction that they seem to point us in. Of course there is some human factor in there, and people will investigate what they like.
@FOURSKYS:
You wrote:
"""Insert quip/argument for/against string theory here"""
LOL, they sure are good at the politics aren't they.
From the wife:
One of the important emotions involved is ambition. If there are competing theories or just ideas on the market there will always be scientists pursuing them, b/c they might be the ones making a new discovery. That's a pretty good guarenttee that even weird ideas will be explored to some degree before being discarded.
@QBEAM:
You wrote:
""" funding decisions being made on purely unscientific guesswork."""
You cannot say that science is based on unscientific principles based on what funding committees decisions are based on. If you would give an example of actual science that'd be helpful.
@Zoid:
You wrote:
"""
From a standpoint of logical debate, FourSkys counter-example is not particularly applicable. QBeam gave examples of funding decisions being made on purely unscientific guesswork. He never said "all funding decisions...", he said "some". Therefore, counter-examples do not disprove his assertion.
"""
You're right that one cannot make a counter-example to something that is just "some".
I'm going to summerize what I think QBeams and FourSkys positions are:
1) QBeam: that science is based on unscientific principles and that unscientific principle can get funding.
2) FourSkys: that science is based on scientific principles and that most (all) funding goes to scientificly based work.
I must say that QBeam and FourSkys are both right depending on what area they are talking about. If I remember correctly FourSkys is in Physics (Masters, right?) and QBeam has stated undergrade Physics and then goes onto use examples from medical related feilds, which leads me to think that he's in a medically related feild.
So, I would imagine that this is where the confusion lies. In the hard sciences proposals really need to be justified before anything happens. Whereas in the soft sciences and others, less and less.
\begin{wife and I}
We think that it is necessary to make a distinction between the hard sciences and the soft sciences and then the others. Also, a distinction between theory and experimentation must be drawn. And there are big differences between fundamental and applied research.
We would imagine that the further you get away from the hard sciences (and the more applied the research is) the more political and "hand-wavey" things get.
\end{wife and I}
So, let's summerize the conversation to get a better perspective. Hopefully, I won't screw this up.
QBeam wrote "Because there's never enough time or money to test every hypothesis, those scarce resources get allocated according to what the scientists collectively believe will be most fruitful--in other words, based on unscientific guesses."
Which FourSkys replied, " In fact, most people end up doing a good deal of the work before they put in the grant and experiment proposals, just so they can show good cause that it's worth the investor's money." ... "There's so much fighting over funding, you really can only get money to look at something that you're absolutely assured of seeing."
To which QBeam said, "But I have no idea why you think this means that they won't fund research based on unscientific guesses." and gives an example of funding denied b/c of unscientific reasoning.
So FourSkys countered with two examples o
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
batmarlowe wrote:
Quote:
...Anne Francis played "Honey West", not "Kitty West"...
Jeez, yer right! The only reason I remember that show at all is because Anne Francis was the first woman I ever loved. I couldn't have been more than 7 or 8 when it originally aired, but I'd sneak behind Dad's lounge chair to watch it.
She made me feel all funny inside...
Respectfully,
zoid
P.S.
Looked it up: "Honey West" was on for one season, 1965, when I was 7. I don't know where I got 'Kitty West' from... I have my suspicions, but they're not fit for family entertainment...
_________________________________________________
"Sure as I know anything, I know this: I aim to misbehave." -Capt. Mal Reynolds, Serenity, a.k.a. 'the BDM'
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
I was only 4 in '65 so I have no recollection of HONEY WEST in it's first run. But I did become aware of the show a few years later. I always liked the idea of a female private eye. And let's just say that Anne Francis is worthy of being your first. For me it was Jeannie and Samantha. And of course Emma Peel. Since I was 5 when BATMAN premiered it wasn't until re-runs when I was a bit older that I began to appreciate Julie Newmar as Catwoman. And did you see her in LI'L ABNER as Stupefyin' Jones? Whew! Good casting.
But lest I completely hijack this thread I must quickly add that Jeannie and Samantha were Quantum Physicists, while Catwoman...pretty much an Einsteinian Relativist.
I'll be quiet now.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
It's 4:03 AM in my locality, so:
"High Hopes", by Pink Floyd
Beyond the horizon of the place we lived when we were young
In a world of magnets and miracles
Our thoughts strayed constantly and without boundary
The ringing of the division bell had begun
Along the Long Road and on down the Causeway
Do they still meet there by the Cut
There was a ragged band that followed in our footsteps
Running before time took our dreams away
Leaving the myriad small creatures trying to tie us to the ground
To a life consumed by slow decay
The grass was greener
The light was brighter
With friends surrounded
The night of wonder
Looking beyond the embers of bridges glowing behind us
To a glimpse of how green it was on the other side
Steps taken forwards but sleepwalking back again
Dragged by the force of some inner tide
At a higher altitude with flag unfurled
We reached the dizzy heights of that dreamed of world
Encumbered forever by desire and ambition
There's a hunger still unsatisfied
Our weary eyes still strain to the horizon
Though down this road we've been so many times
The grass was greener
The light was brighter
The taste was sweeter
The nights of wonder
With friends surrounded
The dawn mist glowing
The water flowing
The endless river
Forever and ever
________________________
This song is one of my favorites (especially the live version). It always fills me with a bittersweet melancholy, thinking of the price we pay for our technological society...
Sleepily,
zoid (ragged bandmember)
_________________________________________________
"When I'm a good dog, they sometimes throw me a bone in." -"Nobody Home", The Wall, Pink Floyd
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Oops there goes another rubber tree plant--
"High Hopes" written by Cahn and Van Heusen, sung by Frank Sinatra.
Quoted with irony,
Batmarlowe
We now return you to our regularly scheduled discussion on physics.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by SigmaNunki:
\begin{wife and I}
....
\end{wife and I}
LOL! Have some experience with LaTeX, have we?
(The typesetting language, not the polymer)
Also, I think that was a very good summary, thanks SigmaNunki. I can't say that I have that much to add though, so I'll leave it at this for now... :-)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
QBeam's school must've been one of those in which they gather the cream of the scholastic crop and accelerate their learning. Kinda like The Academy, in Firefly.
Well, it wasn't officially. But it was an elementary school on a college campus, for the children of the professors and grad students. So there was probably a pretty powerful selection effect. So I guess I can't be too surprised if my experience wasn't completely typical.
ThatWeirdGirl is right, though, that the basic principles aren't too much for 4th graders, at least in my experience. I wouldn't try to teach them how to solve for eigenvectors, obviously, but the general principles are doable. Much like we learned the basic principles of electrical circuits, but didn't solve RIC circuit problems. (I think we did R circuits...)
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
I'm still astounded that anyone would be taught this sort of stuff at age nine. In primary school (7 years of school before high school - I guess this would equate to junior high?) we did almost no physics that I can recall. I don't see how you can even touch on wpd without already having a solid basis in the subject.
Yeah, 4th grade was the first year that experimental physics was one of my subjects in school. The subjects and experiments were pretty simple, obviously. With nothing but basic algebra, the number of problems you can solve is pretty limited. But you can do things like computing mass with an oscillating platform, and observing the difference between mixing and disolving by measuring changes in volumes. We built flashlights from scratch, too--including making the carbon battery. (Actually, I think making the battery was the official project--a bunch of us just went on to make them into flashlights on our own, to show that they worked right.)
We didn't do any experiments in WPD, other than making a diffraction grating. But we did read about the electron scattering experiments that were some of the first proof of the atomic nature of matter, and the Michelson-Morley experiment. Like I said, the ideas don't seem very tough, even for a 9-year-old. I just think the average school system has standards that are way to low.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
You state that the direction of science is based on unscientific guesses. This couldn't be more false. The scientific guesses are based on previous science and what direction that they seem to point us in. Of course there is some human factor in there, and people will investigate what they like.
You cannot say that science is based on unscientific principles based on what funding committees decisions are based on. If you would give an example of actual science that'd be helpful.
We must be talking past each other, because I think this is more than adequate proof of my thesis.
All I'm saying is that, by definition, before we know something via the scientific method, we have to form opinions about it using our other faculties. A fortiori, the decisions we make about which hypotheses to test scientifically are unscientific. They're based on something in our emotional make up, and our personal expierences.
For example, I know that physicists have an emotional attachment to the concept of elegance. (I do to! I'm not pointing fingers...) Theories that propose elegant solutions are presumed to be more likely to be correct. And yet, its doubtful that the concept of elegance could even be operationalized, much less tested scientifically.
Quote:
I'm going to summerize what I think QBeams and FourSkys positions are:
1) QBeam: that science is based on unscientific principles and that unscientific principle can get funding.
2) FourSkys: that science is based on scientific principles and that most (all) funding goes to scientificly based work.
No, if I've given the impression that this is my thesis, then I've chosen my words poorly. As I hope the section above makes clear, my thesis is that it is completely impossible for us, as human beings, to do anything relying entirely on scientific knowledge--including the practice of science.
Quote:
Now QBeam gets back with non-understanding why FourSkys says that people can't get funding with research based on non-scientific guesses and further remarks that "scientist often formulate their opinions based on unscientific guesses." (NOTE: This is different to what QBeam said prior which is quoted above. ie diff between often and all) Then gives an example of funding decisions based on "purely unscientific guesswork." and FourSkys gets back with two examples of well planned and justified funding projects.
Ah, I hope this hasn't been a source of confusion. My choice of words may have been sloppy, but the truth is there's no logical difference between the two statements, at least as I meant them. The reason is that something can't be "a little bit scientific," any more than one can be "a little pregnant." Either something satifies the conditions to qualify as scientific methodology, or it doesn't. As I've said, the overall process by which humans decide which hypotheses to test scientifically can't be scientific. (See Goedel's incompleteness theorum.)
That's why the counter to the funding issue I raised, about people doing pilot studies, doesn't work. It's just begging the question, by moving the pre-scientific decision point farther forward (in those cases where those pilot studies in fact qualify as good science--they don't always, of course).
Quote:
I must say that QBeam and FourSkys are both right depending on what area they are talking about. If I remember correctly FourSkys is in Physics (Masters, right?) and QBeam has stated undergrade Physics and then goes onto use examples from medical related feilds, which leads me to think that he's in a medically related feild.
An interesting deduction, but a mistaken one... Most of my degrees are in physics. Frankly, biology was my weakest area. My roomate on campus was a molecular biologist/geneticist, which is how I learned most of what I think I know about those fields.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME
Quote:
Originally posted by QBeam:
All I'm saying is that, by definition, before we know something via the scientific method, we have to form opinions about it using our other faculties.
But what about this is unscientific? just because something has yet to be proven, doesn't mean that the hypothesis is unscientific. The development of the numerous hypotheses is based on purely scientific grounds (under normal circumstances). You make assumptions based on previous scientific evidence. There is a logical train of thought that leads you to new hypotheses. Yes, there are surely many hypotheses that can lead from a single experiment, and there are many different ones to investigate. The choice is "generally" made from a plausibility argument, (i.e., which hypothesis is more liekyl to prove true), but not necessarily. Sometimes you look at what you think would be more interesting, sometimes you look into what you think is more fun. Is this what you mean by unscientific? Because the hyptothesis is still completely scientifically sound. The decision on what to investigate needs to be made sure, and I'll admit, one doesn't always need to use the scientific method to chose the one to look at, but that doesn't make it unscientific in my opinion.
NOTIFY: Y | REPLY | REPLY WITH QUOTE | PERMALINK | TOP | HOME