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A U- tube contains water and methlated s...

A U- tube contains water and methlated spirit separated by mercury . The mercury columns in the two arms are in level with 10.0 cm of spirit in the other. What is the specific grvity of spirit ?

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Pressure at A and B are equal .
`thereforeP_(1)=P_(2)`
`thereforeh_(1)rho_(1)g=h_(2)rho_(2)g`
`thereforerho_(2)=(h_(1)rho_(1))/(h_(2))`
`=(10xx1)/(12.5)`
`=0.8gcm^(-3)`
Relative density of spirit `=("Density of spirit")/("Density of water")`
`=(0.8)/(1)=0.8`
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