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Answer to Question #88435 in Physics for Anderson
Question #88435
A U - tube manometer containing mecury gives a height reading of 250mm of mecury when connected to a gas cylinder. If the barometer reading at the same time is 756mm of mecury.What is the absolute pressure of the gas in cylinder?
Expert's answer
The absolute pressure is a sum of atmospheric pressure and gauge pressure. So
"p=p_a+p_g=250+756=1006 \\:\\rm{mm\\; of\\; mercury}""1006 \\:\\rm{mm\\; of\\; mercury}=13600\\:\\rm{kg\/m^3}\\times 9.8\\:\\rm{N\/kg}\\times 1.006\\:\\rm{m}""=134000\\:\\rm{Pa}=134\\:\\rm{kPa}"
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