O-LevelPhysicsThermal Physics5054/11 · May/June 2010 · Q151 Mark

When a refrigerator is switched on for the first time, the air surrounding the ice-box is cooled. What happens to the density of this air and to its position inside the refrigerator?

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Adecreases sinks to the bottom

Bdecreases stays at the top

Cincreases sinks to the bottom

Dincreases stays at the top

✓ Correct answer

C: increases sinks to the bottom

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2010 Paper 1 Variant 1, question 15.

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