A physics student records the time for a pendulum to complete 20 oscillations as 32.4 s. She then calculates the period of one oscillation. How many significant figures should she report in her final answer?

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Question

A physics student records the time for a pendulum to complete 20 oscillations as 32.4 s. She then calculates the period of one oscillation. How many significant figures should she report in her final answer?

Accepted Answer

3 — Award 1 mark for recognising that the answer should have the same number of significant figures as the measurement with the least significant figures. The original measurement 32.4 s has 3 significant figures, so the calculated period should also have 3 significant figures.

Answer

1

Answer

2

Answer

4

Answer

3

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