The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

The liquid used in manometers should have

The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

If the depth of water in an open channel is greater than the critical depth, the flow is called