1.

A sphere of brass is suspended to a vertical spring and oscillates with frequency f'. The ball is now immersed is non-viscous liquid whose density is (1)/(10) th of density of brass. If the sphere remains vibrating in the liquid the frequency f now will be :

Answer»

`f' = f`
`f'=SQRT((10)/(9))f`
`f'=sqrt((10)/(9))f`
`f'=sqrt((9)/(10))f`.

SOLUTION :`T=2PI sqrt((m)/(k))impliesf=(1)/(T)=(1)/(2pi)sqrt((k)/(m))`
When BALL is immersed in the liqiud then m and k remain the same so frequencyy also remains the same. Thus correct choice is (a).


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