O-LevelPhysicsThermal Physics5054/12 · Oct/Nov 2016 · Q221 Mark

The thermal energy produced by an electric heater in three minutes is used to melt wax. The wax is initially at its melting point of 60 °C. The specific latent heat of the wax is 220J/g. The heater supplies 7700 J of thermal energy to the wax. How much wax melts?

A0.58 g

B1.7 g

C12g

D35 g

✓ Correct answer

D: 35 g

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 22.

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