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Question

A vessel contains oil (ρ=0.8gmcm3) over mercury (ρ=13.6gmcc). A homogenous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere is _____ gmcc.


A
3.3
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B
6.4
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C
7.2
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D
12.8
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Solution

The correct option is C 7.2
ρ0v2g+ρHgv2g=ρs.v.g
ρs=ρ0+ρHg2=7.2gcc
 

Physics

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