A village maintains a large tank with an open top, containing water for emergenc

Question

A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.25 cm. The hose ends with a nozzle of diameter 2.05 cm. A rubber stopper is inserted into the nozzle. The water level in the tank is kept 7.50 m above the nozzle. (a) Calculate the friction force exerted by the nozzle on the stopper. ________________ N???? (b) The stopper is removed. What mass of water flows from the nozzle in 2.00 h? _____________ kg ??? (c) Calculate the gauge pressure of the flowing water in the hose just behind the nozzle. _____________Pa ???

Explanation / Answer

C) pressure = pgh = 1000*10*7.5 N/m^2

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