On the temperature dependence of the velocity of sound in liquid helium
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The velocity of the first sound in helium II for the low-temperature region in which the lawT4 ln(const/T) holds is calculated. The constant in the logarithm is shown to be very small, and therefore the known results of the logarithmic approximation are not sufficient.
KeywordsHelium Magnetic Material Liquid Helium Logarithmic Approximation
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