initial liquid helium transfer

Paul showing Erik how to do initial helium transfer

Jun 3, 2008

Category:

Education

Tags:

• northwestern
• mesoscopic
• physics
• lab
• liquid
• helium
• transfer

[douglasg14b]

@TheAmazingJackson

Liquid Helium Boiling point-4.2 K Superfluid transition temp-2.17 K

This means that helium in not within your billionth of a degree of absolute zero, far from it actually.

Helium just sitting there boiling is at ~4.2 K

The superfluid is at 2.17 K or less

4.2 K= 4.2 degrees from zero

2.17 K=2.17<= degrees from 0

you'r derping. or just copy/pasta?

[TheAmazingJackson]

liquid helium is within a billionth of a degree of absolute zero. It's a superliquid or Bose-Einstein condensate so it's not -271.15°C but it's about -271.150000000001°C but that's pretty damn close. We know what absolute zero is but we've never reached the actually temperature but got extremely close!!!!!

[weezilla]

10^-6 of 0K reached at U.Colorado using Bose-Einstein condensates.

Absolute zero is 0K or -273.15°C or -459.67°F. Common LHe is 4.2K or -268.95°C.

°K is incorrect. Kelvin is absolute, so there is no ° symbol, nor do we say "degrees Kelvin."

It is dangerous, but it boils extremely easily. Once it becomes a gas, it's not quite as dangerous but still quite cold.

[afpskierx]

Thats in celcius. -273.15 centigrade is 0 K.

[EmilyMcdreamy]

@TheEsseboy 4

[EmilyMcdreamy]

@LegacyBenJVEVO thats not possible the lowest tempture is -273

[LegacyBenJVEVO]

@TheEsseboy Helium boils at -470 degrees F

[TheEsseboy]

@titusvillepaintball nope its around 3kelvin ;)

[NutsandGuts]

@steadfast1984 (1/1000) * 0K = 0K.... so man actually achieved 0K?

[TheFerruccio]

@HTM1982 False! Helium does not solidify under atmospheric pressure at any temperature! You need almost 25 atmospheres of absolute pressure to solidify helium.