A pair of stars rotates about a common centre of mass. \( \mathrm{P} \) One of the stars has a m...

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A pair of stars rotates about a common centre of mass.
\( \mathrm{P} \) One of the stars has a mass \( M \) and the other \( m \). Their centres are a distance \( d \) apart, \( d \) being large compared to the size of either
W star. Derive an expression for the period of revolution of the stars about their common centre of mass. Compare their angular momenta and kinetic energies.
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