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[" 21.An engine pumps water through a ho...

[" 21.An engine pumps water through a hose pipe.Water passes "],[" through the pipe and leaves it with a velocity of "2ms^(-1)" ."],[" The mass per unit length of water in the pipe is "],[10kgm^(-1)" .What is the power of the engine? "],[[" (c) "400W," (b) "200W],[" (c) "100W," (d) "800W]]

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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?

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