Är all materia fast vid den absoluta nollpunkten?? (0 grader Kelvin)

Nej. Det framgår av tråden. Helium är flytande vid normalt lufttryck vid absoluta nollpunkten. Enskilda molekyler, elektroner och protoner rör sig dessutom definitivt.

Nu är det länge sen jag läste fysik, men det där gäller väl bara He3 och vid noll Pa.
Då hålls He3 i flytande form pga nollpunktsenergin. Eller...?

Unlike any other element, helium will remain liquid down to absolute zero at normal pressures. This is a direct effect of quantum mechanics: specifically, the zero point energy of the system is too high to allow freezing. Solid helium requires a temperature of 1–1.5 K (about –272 °C or –457 °F) and about 25 bar (2.5 MPa) of pressure.[42] It is often hard to distinguish solid from liquid helium since the refractive index of the two phases are nearly the same. The solid has a sharp melting point and has a crystalline structure, but it is highly compressible; applying pressure in a laboratory can decrease its volume by more than 30%.[43] With a bulk modulus on the order of 50 MPa[44] it is 50 times more compressible than water. Solid helium has a density of 0.214 ± 0.006 g/ml at 1.15 K and 66 atm; the projected density at 0 K and 25 bar (2.5 MPa) is 0.187 ± 0.009 g/ml.[45]

Nej.



http://en.wikipedia.org/wiki/Helium#Solid_and_liquid_phases