question_answer

A heavy brass sphere is hung from a weightless inelastic spring and as a simple pendulum its time period of oscillation is T. When the sphere is immersed in a non-viscous liquid of density 1/10 that of brass, it will act as a simple pendulum of period:

A)  \[T\]                                    

B)  \[\frac{10}{9}T\]             

C)         \[\sqrt{\left( \frac{9}{10} \right)}T\]      

D)         \[\sqrt{\left( \frac{10}{9} \right)}T\]

E)  \[\frac{9}{100}T\]