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Superfluid helium is what you get when you cool helium to near absolute zero under normal atmospheric pressure (1 atm). From absolute zero up, the phases of helium at normal atmospheric pressure are superfluid, liquid, gas; higher pressure than atmospheric is required to produce solid helium. Superfluid is a state of matter that can only be understood using quantum mechanics. It is similar to a liquid, but different in certain ways: in particular, zero viscosity and infinite thermal conductivity. It is related to a Bose-Einstein Condensate. The term superfluid helium usually refers to superfluid ^4Helium, helium-4 with a nucleus containing two protons and two neutrons and overall quantum mechanical spin zero. Superfluid ^4He exists below about 4 degrees Kelvin (at 1 atm). The isotope ^3He, helium with a nucleus with only one neutron, exists as a superfluid at lower temperatures, below one kelvin, and different mathematics is required to describe it; the differences follow from the fact that the ^3He atom has quantum mechanical spin 1/2.
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Is liquid helium a super fluid?
A little bit of yes and a little bit of no. There are two issues: Between its boiling point (about 4.2 K) and its "lambda point" (around 2.2 K), liquid helium-4 is a normal liquid. Below the lambda point, however, helium-4 becomes superfluid. The isotope helium-3 also has a superfluid phase, but it occurs at a significantly lower temperature. So whether the answer to your question is "yes" or "no" depends on which isotope of helium you're talking about, and exactly what the temperature is.
What is the simble for helium?
The symbol of Helium is He. Helium's atomic number is 2.
What are the symbols for hydrogen and helium?
The symbol for hydrogen is H, and the symbol for helium is He.
Is helium paramagnetic?
AnswerThere are two variants of helium -- helium 3 and helium 4. Helium 4 is not magnetic but helium 3 is. Its magnetism is, however, of different nature than e.g. that of iron. The magnetism of helium 3 is used for medical lung imaging.
Is helium gas a compound?
No, helium gas is not a compound. Helium is an element, which means it consists of only one type of atom.
What has the author John Frank Allen written?
John Frank Allen has written: 'Superfluid helium' -- subject(s): Superfluidity, Liquid helium
What has the author Cecil Taverner Lane written?
Cecil Taverner Lane has written: 'Superfluid physics' -- subject(s): Helium, Superfluidity
What has the author Alun JE Williams written?
Alun J.E Williams has written: 'The lifetime of quantised excitations on the surface of superfluid helium'
Is liquid helium a super fluid?
A little bit of yes and a little bit of no. There are two issues: Between its boiling point (about 4.2 K) and its "lambda point" (around 2.2 K), liquid helium-4 is a normal liquid. Below the lambda point, however, helium-4 becomes superfluid. The isotope helium-3 also has a superfluid phase, but it occurs at a significantly lower temperature. So whether the answer to your question is "yes" or "no" depends on which isotope of helium you're talking about, and exactly what the temperature is.
What is the best and worst transmitter of sound?
The worst would be a vacuum. The best probably depends on your definition of "best", but maybe something like superfluid liquid helium?
What is a good catch phrase for helium?
Helium is normally a gas; at very low temperatures it does liquify, but it has no solid phase, no matter how cold it gets (it does, however, have a very unusual "superfluid" phase at temperatures approaching absolute zero).
What will helium turn into when it freezes?
Theoretically, helium will turn into a solid, but because helium's freezing point is so low (less than -272 oC) and the lowest temperature is -273 oC (0 K), that doesn't happen. When helium is a liquid, which happens after it condenses, it acts as a superfluid, defying gravity and seeping through containers.
Is He a symbol of an element?
Yes, it is. It is the symbol for Helium. It has an atomic number of 2. Helium is the second most abundant element in the universe. Another fact that is very interesting is: 'At temperatures close to absolute zero helium condenses to a liquid with amazing properties – the properties of a superfluid, flowing with zero friction up and over the walls of containers'.
What is the superfluid vacuum theory and how does it explain the fundamental nature of the vacuum in quantum physics?
The superfluid vacuum theory proposes that the vacuum of space is not empty but filled with a superfluid that has unique properties. This theory suggests that particles and forces arise from the interactions of this superfluid, providing a deeper understanding of the fundamental nature of the vacuum in quantum physics.
What has the author Steven W Van Sciver written?
Steven W. Van Sciver has written: 'Final technical report on superfluid helium dynamics' -- subject(s): Fluid dynamics, Porous materials
Does superfluid have a definite shape and volume?
No.
Can red Mercury become a superfluid?
No
