Source: /cirosantilli/superfluid-helium-4

= Superfluid helium-4
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= Helium II
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Also sometimes called <helium II>, in contrast to <helium I>, which is the non-<superfluid> <liquid helium> phase.

\Video[https://www.youtube.com/watch?v=unUNQNmuvUQ]
{title=<Superfluid helium> Resonance Experiment by <Dietterich Labs> (2019)}