When one arm of a U-tube manometer is connected to a gas ...
When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube is shown in the figure above, if the atmospheric pressure is 76.0cm hg, the gas pressure is
62.6cm hg
72.5cm hg
79.5cm hg
85.9cm hg
Correct answer is D
No explanation has been provided for this answer.
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