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post #151 of 190
Quote:
Originally Posted by Blindrage606 View Post

What? Absolute zero is not impossible due the uncertainty principle; the uncertainty principle is largely unrelated to absolute zero in this context because it dictates that only either location or velocity/momentum can be known at a particular moment....lol at quantum physics...tongue.gif
It's impossible for all particles to be stopped because of it. I never looked into it; my dad took quantum physics in university, and he told me that.
post #152 of 190
Quote:
Originally Posted by Art Vanelay View Post

It's impossible for all particles to be stopped because of it. I never looked into it; my dad took quantum physics in university, and he told me that.


The uncertainty principle is not the cause of why particles cannot be stopped.
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post #153 of 190
Quote:
Originally Posted by DuckieHo View Post

The uncertainty principle is not the cause of why particles cannot be stopped.
Wikipedia seems to have explained it pretty well.
Quote:
Roughly speaking, the uncertainty principle states that complementary variables (such as a particle's position and momentum, or a field's value and derivative at a point in space) cannot simultaneously be defined precisely by any given quantum state. In particular, there cannot be a state in which the system sits motionless at the bottom of its potential well, for then its position and momentum would both be completely determined to arbitrarily great precision.
post #154 of 190
Quote:
Originally Posted by Art Vanelay View Post

Wikipedia seems to have explained it pretty well.
Quote:
Roughly speaking, the uncertainty principle states that complementary variables (such as a particle's position and momentum, or a field's value and derivative at a point in space) cannot simultaneously be defined precisely by any given quantum state. In particular, there cannot be a state in which the system sits motionless at the bottom of its potential well, for then its position and momentum would both be completely determined to arbitrarily great precision.

Note... that is not causation.

Particles move. How do you cool something close to absolute zero? You remove the particles that faster than others. However, you can only do this so much until you are left with a few particles. These particles are still moving... just slower than the others. Now, how would you be able to reach absolute zero at this point? By removing energy.... but you cannot because any device that could would have to be cooler than these atoms or would apply too much energy to the system and increase temperature.
Edited by DuckieHo - 7/3/12 at 12:33pm
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post #155 of 190
Quote:
Originally Posted by DuckieHo View Post

Note... that is not causation.
Particles move. How do you cool something close to absolute zero? You remove the particles that faster than others. However, you can only do this so much until you are left with a few particles. These particles are still moving... just slower than the others. Now, how would you be able to reach absolute zero at this point? By removing energy.... but you cannot because any device that could would have to be cooler than these atoms or would apply too much energy to the system and increase temperature.

and correlation does not equal causation.

It's like going faster than light (in my laymans understanding)..

to go FTL, you need an object that is already FTL, same with the "epic freezing" (absolute zero).
Quote:
Originally Posted by Art Vanelay View Post

Wikipedia seems to have explained it pretty well.
Quote:
Roughly speaking, the uncertainty principle states that complementary variables (such as a particle's position and momentum, or a field's value and derivative at a point in space) cannot simultaneously be defined precisely by any given quantum state. In particular, there cannot be a state in which the system sits motionless at the bottom of its potential well, for then its position and momentum would both be completely determined to arbitrarily great precision.

wikipedia is not a good source tongue.gif.
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post #156 of 190
Quote:
Originally Posted by Nocturin View Post

wikipedia is not a good source tongue.gif.
They had an actual mathematical explanation of zero point energy that correlated the ground state to the uncertainty principle; it seemed legit.
post #157 of 190
Quote:
Originally Posted by Art Vanelay View Post

They had an actual mathematical explanation of zero point energy that correlated the ground state to the uncertainty principle; it seemed legit.

I wouldn't know the difference biggrin.gif, but wikipedia can be changed by any/everyone, so that's why I mentioned it thumb.gif
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post #158 of 190
Quote:
Originally Posted by Nocturin View Post

and correlation does not equal causation.
It's like going faster than light (in my laymans understanding)..
to go FTL, you need an object that is already FTL, same with the "epic freezing" (absolute zero).
wikipedia is not a good source tongue.gif.

Actually it's a little different with an object going faster than light.

The reason things cannot go faster than light is that it is the "cosmic speed limit". Nothing can go faster than it (on relativistic scales, don't get into quantum transfer of information which is seemingly "instant") or otherwise a large amount of models would break down. Otherwise, Einstein reasoned, we would have different laws of physics for every different place in the universe. Einstein's intuition was that things were simpler. So hence came the theory of special relativity, which states that:

1) The speed of light, c, is defined to be the fastest speed possible in the universe.

2) Each inertial reference frame is equally valid as the next - there is not "absolute" reference frame in the universe which is unmoving relative to everything else. In more understandable terms, everything is always measured as moving relative to another "still" object.

So back to the question of "why can't things go faster than the speed of light?"

The answer is in that, one of the mathematical consequences of the Theory of relativity is that the "relativistic mass" of an object increases as it moves. So when an object is going really fast, say, at 95% of the speed of light, it's mass will have increased significantly. When you get to 99.9% of the speed of light, it's mass will increase. As you approach closer and closer to the speed of light, the mass will increase more, and more, and more, also making the object harder to accelerate more and more.

So, it would consequently require infinite amounts of energy for an object with mass to reach the speed of light. It can only get really close to it - 99.99999% of it, for example.

I hope this makes sense. I tried to make it friendly to those who avoid physics like the plague.
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post #159 of 190
Quote:
Originally Posted by Nocturin View Post

I wouldn't know the difference biggrin.gif, but wikipedia can be changed by any/everyone, so that's why I mentioned it thumb.gif
It can be edited by anyone, but if you edit it incorrectly, your edit will be reverted very quickly.
post #160 of 190
400

Still laughed...but there are some decent posts in here. thumb.gif
 
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