Answers

2014-09-10T20:27:51+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Long ago, pendulum clocks were used. Time period of a pendulum is
             T = 2 π √(L/g)
if length is accurate, time period could be accurate.

Time is calculated using the physical quantities that depend on the length and mass of objects. Only when these quantities can be measured accurately, then time durations can be measured accurately.

2 3 2