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pressure

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ab open tube mercury manometer is used to measure the pressure in an oxygen tank. when the atmospheric pressure is 1040 mbar, what is the absolute pressure (in Pa) in the tank if the height of the mercury in the open tube is
a)28 cm higher
b)4.2cm lower, than the mercury in the tube connected to the tank.

  • pressure - ,

    Ptank - Po = (mercury density)*g*(delta H)
    where delta H = (outside column height) - (column height on tank side)

  • pressure - ,

    thankyou!

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