6.30 Compressed air is used to accelerate water from a tube.

Neglect the velocity in the reservoir and assume the flow in the tube is uniform at any section. At a particular instant, it is known that V =6 ft s and dV dt =7 5 ft s2. The cross-sectional area of the tube is A=32 in 2. Determine the pressure in the tank at this instant.

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P h = 4.5 ft Water P6.30 L= 35 ft