A-LevelPhysicsPhysical quantities and units9702/12 · Feb/Mar 2025 · Q121 Mark

A student takes measurements to calculate the density of a liquid in a beaker. The height of the liquid in the beaker is 0.20 m ± 2%. The internal diameter of the beaker is 0.05 m ± 3%. The mass of the liquid is 0.36 kg ± 10%. What is the percentage uncertainty in the calculated density of the liquid?

A2%

B5%

C15%

D18%

✓ Correct answer

D: 18%

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2025 Paper 1 Variant 2, question 12.

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