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The figure below shows the apparatus used to examine the pressure of a gas. Taking density of mercury to be 13600kg/`m^3` and standard atmospheric pressure is 100,000N/`m^2`, calculate gas pressure

Answer Text:
Pa =dhg +pg
Ƥg = Ƥa - Ƥhg
= 100,000- 13,600 x
0.2 x 10
= 100,000- 2 + 27200
= 72,800 N/`m^2`