O-LevelPhysicsThermal Physics5054/12 · Oct/Nov 2020 · Q121 Mark

The diagram shows a diver 20 m below the surface of a lake. The total pressure at this depth is 3.0 x 10⁵ Pa. An air bubble has a volume of 0.60 cm³ as it leaves the diver. It rises to the surface of the lake where the pressure is 1.0 × 10⁵ Pa. The temperature of the air in the bubble remains constant. What is the volume of the air bubble at the surface of the lake?

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A0.20 cm³

B0.60 cm³

C1.8 cm³

D2.4 cm³

✓ Correct answer

C: 1.8 cm³

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2020 Paper 1 Variant 2, question 12.

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