O-LevelPhysicsThermal Physics5054/12 · Oct/Nov 2019 · Q211 Mark

A metal disc is heated to 600 °C and then lowered into a beaker of water. What happens to the mass of the metal disc and to the mass of the water in the beaker?

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Aincreases (mass of metal disc) decreases (mass of water in beaker)

Bincreases (mass of metal disc) no change (mass of water in beaker)

Cno change (mass of metal disc) decreases (mass of water in beaker)

Dno change (mass of metal disc) increases (mass of water in beaker)

✓ Correct answer

C: no change (mass of metal disc) decreases (mass of water in beaker)

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2019 Paper 1 Variant 2, question 21.

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