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Solution: Water is forced out of a fire extinguisher by air pressure, as shown in the figure below. What gauge air pressure in the tank (above atmospheric pressure) is required for the water to have a jet speed of 30.0 m/s when the water level in the tank is 0.500 m below the nozzle?

Problem

Water is forced out of a fire extinguisher by air pressure, as shown in the figure below. What gauge air pressure in the tank (above atmospheric pressure) is required for the water to have a jet speed of 30.0 m/s when the water level in the tank is 0.500 m below the nozzle?