liquidsky

Hey, I read your question on what would happen to something at az. At az atoms still have an energy known as zero point (quantum) energy. (In fact for liquid helium this is greater than it's latent heat of evaporation - why it won't crystallize unless at very high pressures). Because there is this zero point energy, the universe wouldn't blow up, collapse, or anything like that. Your silicon solar cell won't work because the valence band is full and conduction band (where electrons can move) is empty, hwoever the atoms still exist and electrons still "orbit" - but in their lowest energy state. Current theory rules out the possibility of reaching 0K (hup, thermodynamics..) so the next best we can do is talk about what happens at very close to az - things like bec.

Hey mate, I posted a brief outline a bit further above on page 2 of this thread. Let us know if you have more questions on it

You can think of atoms in a bose-einstein condensate as being all 'coherent' waves of matter (in their lowest quantum states of motion) - in the same way as laser light consists of coherent photons. And therefore you can have fun playing with their wave-like properties (nonlinear optics, diffraction, interference, etc..)

In practice to cool something close to absolute zero lasers are used whereby their frequency is just a touch below the frequency that the atoms (in the gas or molecule) will absorb it. Atomic motion towards the laser will cause the light to be doppler shifted to a higher frequency - absorbing the momentum of the light and 'push' it in the direction of the laser light. On average, the atoms will be 'pushed' opposite to their motion and thus eventually slowed down. If your interested in this and want more (and better) information look into the text from the 1997 Nobel Prize for Physics Also just to clarify, at absolute zero (or the limit as you approach AZ, or however you want to look at it), the system is in its lowest energy state (ground state), which is not necessarily equal to 0.

go sparta prague

Go Czech Republic! ÃÆââ¬Å¾Ãâ¦Ã¢â¬â¢EÃÆââ¬Â¦ÃâàI DO TOHO!!

anyone got an account like this still left?

it''s the same on p2p something about woodcutters

10/10 Keep up the good work.

Depending on how you take it and your tolerance one hit/dose would be around 20mg (0.02grams) not 0.2gram. Which would make 400g closer to 20k than 2000 hits..

The best pure is a dead pure!

power series expansion

ok i've tallied the votes and the winner is maniac 666