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Vessel contains oil `(density 0.8 g//c c)` over mercury (density `13.6 g//c c)` A homogeneous sphere floats with half its volume immersed in mercury and the other half in oil. The density of the sphere in g/c c isA. `6.4`B. `7.2`C. `12.8`D. `12.8` |
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Answer» (c) For equilibrium , the total upaward pull be equal to the downward. Pull. If V is the volume of he sphere, we have `((V)/(2))(13.6)g+((V)/(2))(0.8)g=Vrhog` `:. rho=((13.6+0.8)/(2))gcm^(-3)=7.2 gcm^(-3)` |
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