O-LevelPhysicsForces5054/12 · May/June 2022 · Q121 Mark
A manometer contains mercury of density 14000kg/m³. The manometer is connected to a gas supply and the difference in the height of the mercury levels is 72 mm. The atmospheric pressure is 100 kPa. The gravitational field strength g is 10N/kg. What is the pressure of the gas supply?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A90 kPa
B99 kPa
C110 kPa
D200 kPa
✓ Correct answer
C: 110 kPa
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