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Three measurment of the time for 20 osci...

Three measurment of the time for 20 oscillations of a pendulum give `t_1 = 39.6 s, t_2 = 39.9 s and t_3 = 39.5s`. The accuracy in the measument, is

A

39.6 sec

B

39.9sec

C

39.5 sec

D

39.7sec

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The correct Answer is:
D
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Three measurements of the time for 20 oscillations of a pendulum give t_1 = 39.6s, t_2 39.9s and t_3 = 39.5s . The precision in the measurement is

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