A-LevelPhysicsForces, density and pressure9702/12 · Oct/Nov 2018 · Q141 Mark
The density of the air in the atmosphere decreases as the height h above the surface of the Earth increases. Which graph best shows the variation with height h of the pressure p of the air?
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.
Agraph showing pressure p decreasing linearly with height h.
Bgraph showing pressure p decreasing non-linearly with height h, with a zero initial gradient.
Cgraph showing pressure p decreasing non-linearly with height h, with a negative initial gradient and approaching zero asymptotically.
Dgraph showing pressure p decreasing quadratically with height h.
✓ Correct answer
C: graph showing pressure p decreasing non-linearly with height h, with a negative initial gradient and approaching zero asymptotically.
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