261) The sheet of water flowing over a notch or a weir is known as

262) A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

263) A flow in which the quantity of liquid flowing per second is not constant, is called

264) In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

265) The specific gravity of an oil whose specific weight is 7.85 kN/m³, is