62) An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due

63) The discharge over a triangular notch is

64) The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

65) The loss of pressure head in case of laminar flow is proportional to

66) The flow of water through the hole in the bottom of a wash basin is an example of