An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?
Answer & explanation
Correct answer: option 1
P = \(dv^3\rho\)
= \(mu_v^3\)
\(mu = 100 ; v = 2\)
P = 800 W