Consider an expanding sphere of instantaneous radius R whose total mass remains constant The expansion is such that the

Question

Consider an expanding sphere of instantaneous radius R whose total mass remains constant The expansion is such that the instantaneous density p remains uniform throughout the volume The rate of fractiona change in density proportional to A R 1 dp p dt is constant The velocity v of any point on the surface of the expanding sphere is JEE Adv 2017 Paper 2 B R D R2 3

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