Absolute zero isn't anymore zero

[Corporate Thug]

I don't get it.

 

[brianmanahan]

I don't get it.

you better stick to lawyering then :awe:

 

[Ophir]

So answer my one dumb question- is absolute zero a COMPLETE lack of anything moving?

I had understood, as poorly explained in school, as simply being a lack of movement in atoms as a whole. Does it actually mean electrons are in fixed positions, too?

If so, does that mean these negative temperatures are based in the behavior of the less-understand 'smaller than protons/neutrons/electrons' particles?

I'm not asking for a dissertation; the opposite, in fact. Someone give me the kindergarten version of this 'negative kelvin' thing.

Me on quantum physics: :hmm: then D: then :'(

It comes from the thermodynamic definition of temperature, ie T=dq/dS. If you add energy to a system and entropy decreases (as in this case) you get a negative temperature. This has been observed for many years in lasing systems. When you pump more electrons into the excited state than the ground state, you get population inversion. After this, adding more energy to the system increases order as electrons preferentially fill the excited state.

Absolute zero is still absolute zero, the point at which particle kinetic energy equals zero and therefore particle velocity equals zero.

 

[highland145]

I say we go back to the good ole days when Pluto was still a plantet.

 

[Red Squirrel]

In other words, Scientists came to visit Canada, in winter. :awe:

Actually the coldest I've ever seen is -50C. It's mind boggling to think of temps near or at zero kelvin but deep in space it probably gets extremely close to it. I don't think it's possible to hit 0k in a practical sense though, but with this discovery that might be disputable now.

 

[SandEagle]

Science makes my head hurt.

that's why i stick to religion. it's less complicated.

 

[BladeVenom]

So when do we get our anti-gravity cars?

 

[SagaLore]

So when do we get our anti-gravity cars?

when people stop smashing light bulbs against their bald heads

 

[spidey07]

Google super fluid helium to see some strange shit near zee kelvin.

 

[adlep]

Time for James Cameron to raise the bar again...

 

[Jeff7]

Some of the things that happen near zero are crazy. Look at superfluids. Damn stuff is so viscous it will flow up and over it's container.

Word usage:
High viscosity = high resistance to flow.

Superfluids = no viscosity.

Google super fluid helium to see some strange shit near zee kelvin.

But yes, definitely some wacky stuff going on there. Almost like a gas with high cohesion.