Liquid Helium II the superfluid (part 4 The fountain effect)

A 1963 film by Alfred Leitner demonstrating the remarkable properties of liquid helium when cooled below the lambda point (the superfluid state). The superfluid has zero entropy.

Category:

Science & Technology

Tags:

• Superfluid
• helium
• entropy
• viscosity
• Leitner
• Physics
• statistical
• mechanics

[Rynnakokki]

Put on audiotranscript and play at 2:18

[Zantorc]

@Rynnakokki LOL . Very funny.

[krat0s3]

Cave Johnson

[Zantorc]

@krat0s3

The 12th United States Postmaster General, who held office March 6, 1845 – March 4, 1849?

[Dignitas93]

There's one thing I wonder about:

If the superfluid converts any thermal energy added into mechanic energy, how can it again be heated and turned into gas? Will it always stay superfluid? If so, why isn't it used in nuclear fission power plants to produce energy since it perfectly converts the heat into movement?

[Zantorc]

@Dignitas93 "If the superfluid converts any thermal energy added into mechanic energy, how can it again be heated and turned into gas?"

In general it doesn't and in this experiment only part of the heat is converted into mechanical energy.

[Zantorc]

A exceptionally fine powder of ferric oxide, known as 'jeweller's rouge'. It is used to polish jewellery and remove scratches from glass.

[I0o]

@Rynnakokki aaahhaaha

[mile0chicken]

@Zantorc *facepalm*

[MOAKmemoirs]

@Rynnakokki brilliant hahah

[Rynnakokki]

@Zantorc Sometimes you have to be immature, even when it comes to super fluid demonstrations.

[teeoff123456]

@Zantorc The founder of Aperture Science. Died due to Moon Rock poisoning? Never heard of him? weird...

[Zantorc]

@02watsot

B is wrong. Temperature is related to kinetic energy distribution. The E in E=MC^2 is not kinetic energy. A 2 Kg mass is not twice as hot as a 1Kg mass