248) The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.

249) The discharge through a channel of rectangular section will be maximum, if

250) When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

251) The mercury does not wet the glass. This is due to the property of the liquid known as

252) The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.