1. The problem statement, all variables and given/known data A closed cylindrical tube containing some water (not filling the entire tube) lies in a horizontal plane. If the tube is rotated about a perpendicular bisector, the moment of inertia of water about the axis a)increases b)decreases c)remains constant d)increases if the rotation is clockwise and decreases if it is anticlockwise 2. Relevant equations 3. The attempt at a solution Initially the water is at a greater distance from the perpendicular bisector. But after rotating the cylinder it comes near to the axis. So in the latter case the MI should decrease as it is directly proportional to the distance from the axis.