1.

The length of the second's pendulum is increased by 0.1%. The clock :

Answer»

gains 43.2 s per DAY
loses 43.2 s per day
neither loses nor gains time
none of the above.

Solution :`T=2pi SQRT((L)/(g))`
`:. (T_(2))/(T_(1))=sqrt((l_(2))/(l_(1)))=sqrt((100.1)/(100))=1.0005`.
`impliesT_(2)=2(1.0005)=2.001`s
Loss in time for `2" s"=2.001-2=0.001` s.
`:.`Lossin time per day
`=(0.001)/(2)xx24xx60xx60=43.2` s.
So the CORRECT choice is (b).


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