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water travels through a 9.6 cm diameter fire hose with a speed of 1.3 m/s. At the end of the hose, the water flows out through a nozzle whose diameter is 2.5 cm.

a) what is the speed of the water coming out of the nozzle?

b) what nozzle diameter would be required to give the water a speed of 21 m/s? answers are a) 19 m/s b)d2=2.4 cm

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