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Old 06-22-2005, 07:41 PM   #11 (permalink)
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Heck, I can't remember myself! Now I've got to go on line and look it up!!
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Old 06-22-2005, 07:48 PM   #12 (permalink)
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Temperature and Absolute Zero
We all know that some things feel hot, and others cold, but is there more to temperature than that?

When an object feels hot, the atoms inside it are moving fast in random directions, and when it feels cold, they are moving slowly. Our body interprets that random atomic motion into what we feel as hot and cold, and a thermometer interprets that atomic motion as a certain number of degrees.


So when I'm heating something, I'm just making its atoms move faster?


Exactly. If the object is a solid the atoms are vibrating back and forth, and if it is a gas like the air, the atoms are flying around much like little balls.






They are bouncing around so that sometimes an atom is going fast, and other times it is slow. It seems like its temperature must be changing all the time.


In a group of atoms there is always a whole range of speeds, but while the speed of one atom changes, the average of all of them does not. See how each time an atom slows down, there has to be another that speeds up? So temperature is really describing the range of speeds of the bunch of atoms together. Physicists often like to use a different scale for temperature that is directly related to the speed atoms are going in a gas. This is called the Absolute scale, and one degree on it is the same as one degree centigrade, which is 9/5 of a degree Fahrenheit. The difference between the Centigrade and Absolute scales is the zero label.


What is so "Absolute" about it?

Well, look what happens if you set the temperature of the atoms in the box as low as it can go.


The atoms are stopped.




So that is as cold as the atoms can be. We call that Absolute Zero.


I get it! When the atoms are all stopped the gas is ABSOLUTELY as cold as can be!


Yes, and that is really cold. The thermometer shows a comparison of the Absolute (also known as the Kelvin) and Fahrenheit scales of temperature. Absolute Zero is -459 degrees Fahrenheit.


Is anything actually at Absolute Zero?

The coldest place in nature is the depths of outer space. There it is 3 degrees above Absolute Zero.


Why doesn't it get down all the way to Absolute Zero?




That is a really interesting question. It turns out that the heat left over from the Big Bang that created the universe is everywhere, and it keeps the temperature in space from going any lower than 3 degrees Kelvin. Measuring this temperature is the strongest evidence we have that the Big Bang actually happened. However, people can do a lot better than nature when it comes to getting things cold. For almost a century we have been able to build refrigerators that get to lower than 3 degrees above Absolute Zero, and for quite a while we have been able to even get lower than 1/1000 of a degree above Absolute Zero. However, a big step was when Cornell and Wieman cooled a small sample of atoms down to only a few billionths (0.000,000,001) of a degree above Absolute Zero! That was what they needed to do to see Bose-Einstein condensation.

hehehehehe
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Old 06-22-2005, 07:55 PM   #13 (permalink)
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Incedentally, I think it is impossible to reach absouloute zero, as any method that removes heat would interact with said sample and heat it up. Nice hijack BTW.

I don't really like the idea of my computer being a collection of boxes. Seems to take the fun out everything. but a rack mount system the size of a tower might be neat.
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Old 06-22-2005, 07:59 PM   #14 (permalink)
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Lol....apparnently, there are some chaos physics people who contend that if there is anti-matter, there is anti-temperature....way over my head.
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Old 06-22-2005, 08:01 PM   #15 (permalink)
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Quote:
Originally posted by digitaloracle
...but a rack mount system the size of a tower might be neat.
I like that idea too, a mini rack with my router, cable modem, and voip gateway all getting their own place. The entire rack could be a closed and refrigerted unit...the possibilties are making my head swirl.
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Old 06-22-2005, 08:07 PM   #16 (permalink)
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ok so i think its a good idea, but lets make it more simple than were trying to make it. ok how bout Video card has its own box and the rest is in your normal tower. Video has its own phase change cooling in this box and the tower has its own phase change. kapish?
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Old 06-22-2005, 09:02 PM   #17 (permalink)
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http://www.tomshardware.com/cpu/20031230/index.html
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Old 06-22-2005, 09:32 PM   #18 (permalink)
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^^ what does that have to do w/ anything?
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Old 06-22-2005, 09:33 PM   #19 (permalink)
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nothing but its cold
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