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An open-tube mercury manometer is used to measure the pressure in an oxygen tank. The atmospheric...

An open-tube mercury manometer is used to measure the pressure in an oxygen tank. The atmospheric pressure is 1020 mbarmbar . 1 barbar = 105105 N/m2N/m2. The density of mercury is 13.6×103kg/m313.6×103kg/m3.

a. Determine the absolute pressure (in PaPa) in the tank if the height of the mercury in the open tube is 20.5 cmcm higher than the mercury in the tube connected to the tank.

b. Determine the absolute pressure (in PaPa) in the tank if the height of the mercury in the open tube is 8.6 cmcm lower than the mercury in the tube connected to the tank..

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