An open-tube mercury manometer is used to measure the pressure inan oxygen tank.

Question

An open-tube mercury manometer is used to measure the pressure inan oxygen tank. (a) When the atmospheric pressure is1090 mbar, what is the absolute pressure(in Pa) in the tank if the height of the mercury in the open tubeis 29.0 cm higher than the mercury inthe tube connected to the tank.
1 Pa
(b) What is the absolute pressure if the open tube mercury heightis instead 4.0 cm lower than the mercuryin the tube connected to the tank.
2 Pa
(a) When the atmospheric pressure is1090 mbar, what is the absolute pressure(in Pa) in the tank if the height of the mercury in the open tubeis 29.0 cm higher than the mercury inthe tube connected to the tank.
1 Pa
(b) What is the absolute pressure if the open tube mercury heightis instead 4.0 cm lower than the mercuryin the tube connected to the tank.
2 Pa

Explanation / Answer

   so absolute prssure = atmospheric pr +pressure of fluid = ...[the excess fluid pressure is decresed byext atmpressure]    if lower by 4 cm ,, then = prssure of fluid- atm pr [ as the atm preesure adds to help the Low pressure offluid]
   plz calculate out...........

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