If the velocity of water is 8m/s and the pressure is 140 kPa on the discharge side of a pump,  What will be the head of the pump if the velocity is 4 m/s and the pressure is 90 kPa on the suction side of the pump? How much power is required to drive it if the diameter of suction side is 600 mm? If the pump is rated at 120 hp, what is the efficiency of the pump neglecting energy losses in the system?

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.