71. The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
72. The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called
73. According to Bazin's formula, the discharge over a rectangular weir is $${\text{mL}}\sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{3}{2}}},$$ where m is equal to
74. In an isothermal atmosphere, the pressure
75. Rain drops are spherical because of
76. Surface energy per unit area of a surface is numerically equal to
77. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
78. In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
79. In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
80. To avoid an interruption in the flow of a siphon, an air vessel is provided
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