A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2019 · Q51 Mark

A student wishes to determine the density ρ of lead. She measures the mass and diameter of a small sphere of lead: mass = (0.506 ± 0.005) g diameter = (2.20 ± 0.02) mm. What is the best estimate of the percentage uncertainty in her calculated value of ρ?

A1.7%

B1.9%

C2.8%

D3.7%

✓ Correct answer

D: 3.7%

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 5.

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