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76 cm of mercury column is a measure of ...

76 cm of mercury column is a measure of atmospherice pressure. Express it is `N//m^2` Given density of mercury is `13.6xx10^3 kg//m^3`

Text Solution

Verified by Experts

The correct Answer is:
`1.01xx10^5 N//m^2`
`P = h rho g`
`=((76)/(100)m)(13.6xx10^3kg//m^3)xx(9.8m//s^2)`
`P = 1.01 xx10^5 N//^2`
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Mercury has an angle of contact of 120^(@) with glass. A narrow tube of radius 1.0mm made of this glass is dipped in a through containig mercury. By what amount dies the mercury dip down in the tube relative to the liquid surface outside. Surface tension of mercury at the temperature of the experiment os 0.5 N//m and density of mercury is 13.6xx10^(3) kg//m^(3) . (Take g = 9.8 m//s^(2)) .

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Knowledge Check

  • Torricelli's barometer used mercury but pascal duplicated it using French wine of density 984 kg m^(-3) . In that case, the height of the wine column for normal atmospheric pressure is (Take the density of mercury =1.36xx10^(3) kg m^(-3) )

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