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A mercury barometer in a physics laborat...

A mercury barometer in a physics laboratory shows a 732 mm vertical column of mercury. Calculate the atmospheric pressure in pascal.
[Given density of mercury , `rho = 1.36 xx 10^(4) kg m^(-3) , g = 9.8 m s^(-2)`]

Text Solution

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Atmospheric pressure in the laboratory,
` P = h rho g = 732 xx 10^(-3) xx 1.36 xx 10^(4) xx 9.8`
` = 9.76 xx 10^(4) Pa "(or)" 0.976 xx 10^(5) ` Pa
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