A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2025 · Q31 Mark

A student calculates the density of a solid steel cube in an experiment. The measured mass is 975g±10g and the measured length of side is 50mm±1mm. What is the density of the steel?

A7.8gcm-3±3.0%

B7.8gcm-3±7.0%

C7.8gcm-3±11%

D7.8gcm-3±13%

✓ Correct answer

B: 7.8gcm-3±7.0%

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2025 Paper 1 Variant 2, question 3.

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