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Find the difference in levels of mercury...

Find the difference in levels of mercury in the limbs of a U-tube if the diameter fo bore of one limb is 1mm and of the other 4mm. The surface tension of mercury is `544 xx 10^(-3) "Nm"^(-1)` its density is `13.6 xx 10^(3) "kg" m^(-3)` and angle of contact is `130^(@).`

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The correct Answer is:
`(0.00787 m)`
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