A rubber ball floats in water with 3/7 of its volume above the surface of water. Calculate the relative density rubber ball ?
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Answer:
Relative density is 4/7
Explanation:
The net force acting on the ball is zero
Buoyant force = Weight of the ball
(4/7)(Dw)(V)(g) = (Dr)(V)(g)
Where V is the volume of the ball, Dw is the desnsity of water and Dr is the density of rubber
So we get Dr/Dw to be 4/7
Therefore relative density of rubber is 4/7
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