G. Give reason :
1. Most of the natural phenomena are periodic in nature.
2. Pendulum is the mother of watches and clocks.
3. We need to measure time.
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1)=Most of the natural phenomena are periodic in nature because they repeat themselves at regular intervals.
2)=The time it takes to make a swing. All clocks would sends out tiny vibrations as the pendulum swings and causes the gears inside the clock to move, thereby linking the swing of pendulum with the timing of clock by proper synchronisation of the dial and gear mechanism inside the clock.
3)=All our activities depend on time. ... For example, to know the duration of a journey, to meet the schedules in work, to know whether its day or night, to know the heartbeat, to know the amount of time taken by the computer to perform an operation etc. Hence it is very important to measure the time.
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