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Physics (AS & A Level) · Feb / March 2022 · Paper 12 · Question 3

9702Errors and uncertainties

A man of mass 75.2 kg uses a set of weighing scales to measure his mass three times. He obtains the following readings. [table: mass / kg; reading 1: 80.2; reading 2: 80.1; reading 3: 80.2] Which statement describes the precision and accuracy of the weighing scales?

  1. Anot precise to ± 0.1 kg and accurate to ± 0.1 kg
  2. Bnot precise to ± 0.1 kg and not accurate to ± 0.1 kg
  3. Cprecise to ± 0.1 kg and accurate to ± 0.1 kg
  4. Dprecise to ± 0.1 kg and not accurate to ± 0.1 kg

As printed in the paper

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Correct answer: D. precise to ± 0.1 kg and not accurate to ± 0.1 kg

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