Question

The accuracy in the measurement of time for 20 oscillations of a pendulum for the following measurement  t₁=39.6s , t₂=39.9s and t₃=39.5 s , is 

A)±0.2s

b)±0.3s

c)±0.5s

d)±0.4s

Answer 1

correct option is A)±0.2s