What is superfluidity?
A phase of matter with zero viscosity
A type of magnetism
A form of radiation
A chemical reaction
Answer
Superfluidity is a phase of matter characterized by zero viscosity, meaning it flows without any resistance. This remarkable property allows superfluids to exhibit unique behaviors, such as flowing through narrow channels without friction and forming rotating vortices that persist indefinitely. Superfluidity is typically observed in certain materials, such as liquid helium, at extremely low temperatures near absolute zero.
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