Water is forced out of a fire extinguisher by air pressure, Ask an Expert

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Water is forced out of a fire extinguisher by air pressure, as shown in Figure P9.64 where h = 0.495 m. How much gauge air pressure in the tank (above atmospheric) is required for the water jet to have a speed of 33.0 m/s when the water level in the tank is 0.495 m below the nozzle?

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