A simple pendulum with a solid bob has period T. what wil be the period of it if it is made to oscilate in a non viscous liquid of density §?(density of bob is d.)

T is inversly proportional to sqrt of weight

T  =  KW^-1/2 

T/T¹ = (W/W¹)^-1/2

W=mg = dVg                 (v is the volume of bob ,d dencity of bob & d_w dencity of liquid)

W¹ = dVg - d_wVg

substituting these values

T¹ = T[(d - d_w)/d]^-1/2

T¹ = T / [1 - d_w/d]^1/2

Approved