61. Newton’s law of viscosity is a relationship between
62. Mercury is often used in barometer because
63. For a floating body to be in equilibrium
64. Resultant pressure of the liquid in the case of an immersed body acts through
65. Buoyant force is
66. Coefficient of contraction for an external cylindrical mouthpiece is
67. Surface energy per unit area of a surface is numerically equal to
68. Specific weight of sea water is more that of pure water because it contains
69. The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is
70. A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is
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