superfluid Helium II

[AntiProtonBoy]

Interesting subject, too bad the video quality is very poor. Any chance of a re-upload?

[MysticGohan127]

i don't see shit captn

[AIRJUSTY]

Nice!

[MrPepsi305]

Ummm, can someone tell me how I got from Minecraft to this?

[denvera1g1]

sense helium4 II is not viscus could a perpetual fountain be made? where you release the initial volume of SF so that it falls into a funnel through a tube that "Us" and sends it up again in a ballistic freefall, to theoretically the same hight as where you dropped it, into another identical funnel/tube to repeat the process through a series of tubes that eventually lead back to tube 0?

[Stillwater900]

Terrible video

[demontoarch]

is the superfluid bose-einstein condensate?

[MrBrownstoneize]

I want to lick it.

[LBPFan65]

It's possible to get there not yet though and all molecules stop

[poorkingz]

We must get the dislikes/likes close to absolute zero!

[Norvum]

Do liquids boil at cold temps? If so why?

[hagglefaen]

@Norvum Well, yeah, if the liquids boiling point is low, it will boil at a low temp :). For example, Helium has such a low boiling point that it's always gas under room-temperature. Thats why we know Helium as gas. When you pour Helium at a room-temperature surface, the helium almost instantly begins to boil, because the surface is, compared to the temperature of Helium in its liquid form, as hot as fire is to water.

The floor in a house is like a hot frying pan for liquid helium.

[Danielst16]

How do they get it down to that temperature in the first place?

[IMA1995]

@Danielst16 They remove the electrons with the most energy so that the fluid can be cold

[LinkBlink]

This was lame... Here is a much better explanation of Heliums Superfluid state, look this up on YouTube "Liquid Helium II: The Superfluid - segment 1of5".

[jony7779]

wow that was cool....not?

[achmedfu]

when its says T<2.2K does that mean it is below absolute zero? caz i didnt know you could get any colder lol

[JNHeyman]

@achmedfu

No - The the temperature was just between 2.2K and zero, but greater than zero, of course.

[11Sparky111]

@achmedfu You can't even get to absolute zero, that means the object that is at absolute zero has no energy left, which is impossible.

[denvera1g1]

@11Sparky111 ***no kinetic energy left, witch is possible, my question is if that includes the movements of electrons and other sub atomic structures

[ECGplayit98]

@achmedfu THat's not below zero, but you can reach a fraction below zero called a Bose-Einstein condensate. Its the most fascinating thin I've tried to conceptualize about quantum physics.

[africamericasianman]

@achmedfu we have yet to get to absolute zero but we can get very close.

[ilivemw2]

@achmedfu nothing can get colder that absolute zero hints the name

[deiutz]

@achmedfu 0k would be absolute zero

[Theasbestross]

Ok I have a very valid question. At this temperature Helium takes on the superfluid state with atoms acting in singular waves and zero viscosity. What addition can be made to Helium with magnetic or conducting properties, that will remain at these temperatures without affecting the zero viscosity properties?

[JNHeyman]

@Theasbestross

Good questions: First, although I work with liquid helium, I am not an expert. There has been a LOT of scientific work done on this, but not by me.

Helium atoms are essentially non-magnetic (no net electron or nuclear spin), so a magnetic field should have no effect. It's also insulating - no free electrons. Interestingly, if free electrons are injected into it, it forms bubbles around the electrons. electrons can also be trapped at surface to form nearly ideal 2D metal.

[Mindbendersmith]

ummm nothing happened that could be seen with the camera...pointless...

[scotchya]

@BattleBits i love that comment lol....... how can someone read that thing knowing from the start what was up.... and not finish it anyway with out laughing ... good job!!! its like poetry man the words you used were perfect..... and the detail omg man great pointless detail.... this reminds me of a time when i was walking down a road and saw a red car driving really fast.... this car was driving toward me.... i was walking toward it...... we passed.... man that red car was red.

[BattleBits]

Guess what. One time I made lime Koolaid and I was stirring the water slowly in with the powder and as I was stirring and the water kept getting higher I realized that the spoon I was using was going to be too short so I just let the water keep swirling around while I got a longer spoon and then guess what when it full I poured myself a big glass of juice and drank it in one big gulp. I was so thirsty. Then you know what after one more glass there was still enough juice for one more glass.

[j24800]

this is the worst youtube video ever

[Phloxicon]

Your tongue would become pregnant.

[FatherWarhol]

I bet if you licked that liquid helium your tongue would get stuck to it

[avatarelite]

no it would turn into helium gas.

[madnesscombat5]

your tonque would asplode.

[XTaintedOneX]

wonder if anything happens at exactly 0 Kelvin :X

[yarahahrwe]

I can fairly confidently say no

[stigomaster]

The world will suddenly cease to exist.

[abaddon1112]

impossible to get to absolute zero because of the zero point field..

[ehinch19]

all particles more a little or vibrate but at 0Kelvin all particles stop moving entirely

[DocWolph]

@ehinch19

That is not known since true absolute zero has not yet been reached. The amount of effort needed to reach absolute zero is currently considered too great. the lowest temperature recorded is one-half of one-billionth of a degree above absolute zero. It is also believed that matter would break down and disintegrate rather than just stop.

[ShiroKage009]

@DocWolph

For all I know matter would not disintegrate at absolute zero. Atoms, as atoms, may stop resonating but sub-atomic particles would still hold their structure (Electrons shall maintain their wave function behavior and the nucleus will probably not change) ..... or so I heard from my professors.

Many things might happen at absolute zero but destruction of matter? I think this should be left for nuclear reactions :P

[62636263c]

I wonder if liquid helium II could be used as the medium in a hallow electromagnetic doughnut to propel it fast enough to cause a real anti gravity effect.

[akulkis]

6263626:

No.

[pianomikey0]

Wouldn't it have flowed out of the container? Or was their a transparent lid over it?

[JNHeyman]

The container (the inside of the cryostat) is very long and deep, and the liquid helium is at the bottom. The top of the container is near room temperature, so liquid helium boils before it can "creep" up the sides. In fact, all the liquid helium in the container boils away in about 15 minutes unless it is refilled.

[pianomikey0]

Ah, I see.

[gur1337]

That's cold.