What is the role of atmospheric pressure in drawing of underground water by a hand pump?

Physics Dec 28, 2020

Expert Solution

It is necessary to create a pressure difference to pump the water from the bottom level to the top level. During the drawing of underground water from the earth's surface, it is necessary to reduce the pressure at the pump cylinder below the atmospheric pressure.

If the pressure of the pump cylinder is more than or equal to the atmospheric pressure, the water can not be pulled out from the underground surface.

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