A mercury manometer is attached to a nozzle through which water flows with an inlet velocity of 2 m/s. Additionally, a piezometer is attached at the small diameter section of the nozzle. The nozzle is inclined at 30° from the horizontal and the distance between the arms of the manometer along the nozzle is 40 cm. The nozzle inlet diameter is 40 cm whereas the exit diameter is 20 cm. Determine the differential height of mercury between the two pipe sections. If the height in the piezometer is 20 cm, determine the pressure at the inlet.

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.