Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, were considered to be:
A) low mass.
B) intermediate mass.
C) high mass.
D) zero-age main sequence.
E) blue stragglers.
C
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Three solid, uniform, cylindrical flywheels, each of mass 65.0 kg and radius 1.47 m rotate independently around a common axis
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