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Question
Name and define the S.I. unit of time. How is it related to (i) minute (ii) hour, (iii) day, and (iv) year?
Solution
The S.I. unit of time is second. In the short form, we write it as ‘ S ’.
One second is the time interval between the two consecutive ticks that you hear from the pendulum wall clock.
(i) 1 min = 60 s
(ii) 1 h = 60 min. = 3600 s.
(iii) 1 day = 24 h = 86400 s.
(iv) 1 year = 365 days = 3.15 × 107 s.
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