21. The volumetric change of the fluid caused by a resistance is known as
22. The discharge over a rectangular notch is
23. The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as
24. The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as
25. The specific weight of water is 1000 kg/m3
26. Density of water is maximum at
27. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be
28. Euler's dimensionless number relates the following
29. The force per unit length is the unit of
30. A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
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