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The tube of a mercury barometer is 1 cm ...

The tube of a mercury barometer is 1 cm in diameter. What correction due to capillarity with effect of meniscus is to be applied to barometer reading if surface tension of mercury is 435.5 dyne/cm and angle of contact of mercury with glass is `140^@`? (density of mercury = `13600 kg//m^3`)

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CHETANA PUBLICATION-MECHANICAL PROPERTIES OF FLUIDS-Exercise
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