On the motion of a sphere in a perfect fluid, with application to liquid helium.
Momentum relationships involved in the motion of a sphere through a perfect fluid are considered. The mechanism, by which the momentum given to a sphere by an external impulsive force is transferred to the container as a whole, is traced through in some detail, and energy and momentum relationships are discussed. Comparison is made with a (3)He atom or a roton moving in superfluid (4)He.
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DEPARTMENT OF CHEMISTRY, UNIVERSITY OF NORTH CAROLINA, CHAPEL HILL.