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The least count of a stop watch is (1//5...

The least count of a stop watch is `(1//5)s`. The time 20 oscillations of a pendulum is measured to be `25 s`. The maximum percentage error in this measurement is

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Error in measuring 25 sec.=0.2sec.
`therefore "percenta error" =(0.2)(25)xx100=0.8%`
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