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Time for 20 oscillations of a pendulum i...

Time for 20 oscillations of a pendulum is measured as `t_(1)=39.6" "s," "t_(2)=39.9" "s and t_(3)=39.5 s.` What is the precision in the measurements?
What is the accuracy of the measurement?

A

39.6 sec

B

39.9 sec

C

39.5 sec

D

39.7 sec

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The correct Answer is:
D
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