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A pump is used to send oil (density 800 kg/s) through a hose the diameter of which is 5 times that of the nozzle through which the water exits. If the nozzle is 1m higher than the pump and the oil flows through the hose at 0.2 m/s, what is the gauge pressure of the oil in the pump? the answer is 18 kPa how do you solve this? Thank you

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