(I) A planet moves around the sun in a circular orbit. Assuming that period of revolution T of planet depends upon radius (R) of its orbit, mass of Sun (M) and universal gravitational constant G then prove :- t2∝R3/GM. 3M (II) check the correction of relation V = [E/ρ]1/2Where:- V = velocity of sound E = Co-efficient of elasticity ρ= density of medium.
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