Question

According to Bernoulli’s theorem the pressure of water should remain uniform in a pipe of uniform radius. But actually its goes on decreasing, why is it so?

Answer 1

When water flows through a pipe, work is done against the viscous force. This work done is taken from the pressure energy. As a result of which the pressure of the water falls, with onward movement of water in pipe. It is due to this reason that a house located at a large distance from a water tank receives water at lower pressure than those houses located closer to water tank.