Should there be any change in the positionof the centre of gravity of a hollow sphere when it is (i) half filled, (ii) completely filled with water?

Should there be any change in the positionof the centre of gravity of

1.	Should there be any change in the positionof the centre of gravity of a hollow sphere when it is (i) half filled, (ii) completely filled with water?
Answer» Solution :The centre of GRAVITY of an EMPTY hollow sphere is at its centre. (i) When it is HALF filled with water the centre of gravity is LOWERED. (ii) When it is COMPLETELY filled with water the centre of gravity again shifts to the centre.