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Consider an expanding sphere of instanta...

Consider an expanding sphere of instantaneous radius ? whose total mass remains constant. The expansion is such that the instantaneous density `rho` remains uniform throughout the volume. The rate of fractional change in density `((dp)/(rhodt))` is constant. The velocity v of any point on the surface of the expanding sphere is proportional to

A

`R3`.

B

R

C

`R^(2//3)`.

D

`1//R`.

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