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An engine pumps water through a hose pip...

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of `2 ms^(1)`. The mass per unit length of water in the pipe is `100 kgm^(-1)`. What is the power of the engine?
(a) 400 W (b) 200W (c) 100W (d) 800W

A

400 W

B

200 W

C

100 W

D

800W

Text Solution

Verified by Experts

The correct Answer is:
D
Power `=fv=v((m)/(t))v=v^(2)(rhpAv) `
`=rho Av^(3)=(100)(2)^(3)=800W`
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