question_answer

The mean value of period of oscillation of a simple pendulum in an experiment is\[\mathbf{2}.\mathbf{825}\text{ }\mathbf{s}\]. The arithmatic mean of all the absolute errors is\[\mathbf{0}.\mathbf{11}\text{ }\mathbf{s}\]. Round off the period of simple pendulum to appropriate number of significant figures. Give reasons.

Answer:

                The absolute error 0.11 s has only two significant figures. \[\therefore \]Period of simple pendulum \[=\text{ 2}.\text{9 s}\] [Rounded off up to 2 significant figures]