A hollow sphere filled with water and one small hole at bottom is hung by a long thread and made to oscillates. The effect on the period of oscillation as water slowly flows out of the hole at bottom………

A hollow sphere filled with water and one small hole at bottom is hung

1.	A hollow sphere filled with water and one small hole at bottom is hung by a long thread and made to oscillates. The effect on the period of oscillation as water slowly flows out of the hole at bottom………
Answer» decreases continuously increases continuoulsy first decrease and then becomes equal to its original value first increases and then becomes equal to its original value Solution :When the hollow SPHERE filled with water, its CENTRE of gravity is at mid-point and hence as the water flow out from a HOLE, its LENGTH increases, so according to `T propto sqrt(l)`, period of oscillation increases. But it completely emply, its centre of gravity coming at MIDPOINT and its period of oscillation becomes as to original period of oscillation.