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Physics (AS & A Level) · Oct / Nov 2025 · Paper 14 · Question 2

9702Errors and uncertainties

A steel rule can be read to the nearest millimetre. It is used to measure the length of a bar whose true length is 895 mm. Repeated measurements give the following readings. length / mm 892, 891, 892, 891, 891, 892 Are the readings accurate and precise to within 1 mm?

  1. Ano / no
  2. Bno / yes
  3. Cyes / no
  4. Dyes / yes

As printed in the paper

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Correct answer: B. no / yes

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