Question

The time taken by a pendulum to complete 25 vibrations is 88.0 s. Find the time period of the pendulum in second upto appropriate significant figures.

Answer 1

Time period of oscillation= `("Total time taken")/("Number of oscillations")`
`(88.0)/(25)s=3.52 s`
Out of the two quantites given in the data, 25 is exact hence has infinite significant figures. Therefore,the answer should be reported qo three significant figures i.e.,3.52 s.