1.

A body of density D_(1) and mass M is moving downward in glycerine of density D_(2) with constant velocity what is the viscous force acting on it.

Answer»

`MG(1-(D_(2))/(D_(1)))`
`Mg(1-(D_(1))/(D_(2)))`
`MgD_(1)`
`MgD_(2)`

SOLUTION :Time period of simple pendulum.
`T=2pisqrt((l)/(g_("eff"))) "Here",g_("eff")=(g^(2)+(W^(2))/(m^(2)C^(2)))^(1/2)`


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