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# Two water reservoirs A and B are connected to each other through a 35m-long, 2-cm-diameter cast...

Two water reservoirs A and B are connected to each other through a 35m-long, 2-cm-diameter cast iron pipe with a sharp-edged entrance. The pipe also involves a swing check valve and a fully open gate valve. The water level in both reservoirs is the same, but reservoir A is pressurized by compressed air while reservoir B is open to the atmosphere at 94 kPa. If the initial flow rate through the pipe is 1.2 L/s, determine the air pressure (gage) in kPa on top of reservoir A. Take p=999.7 kg/m3,J=1.307x10-3 Pas and e=0.260mm Air 2 cm

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