Question: 6.12 The pressurized tank shown has a circular cross section of 6ft in diameter. Oil is drained through a nozzle 2in. in diameter in the

6.12 The pressurized tank shown has a circular cross section of

6.12 The pressurized tank shown has a circular cross section of 6ft in diameter. Oil is drained through a nozzle 2in. in diameter in the side of the tank. Assuming that the air pressure is maintained constant, how long does it take to lower the oil surface in the tank by 2ft ? The specific gravity of the oil in the tank is 0.85, and that of mercury is 13.6

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