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Pressure

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Question

What will be the length of Hg column in a barometer tube, when the atmospheric pressure is 75 cm of Hg & the tube is inclined at an angle of 60° with the horizontal direction?

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Solution

If l is the length of mercury column in the barometer tube, then
h/l=sin60
75/l=√3/2
l=(75×2)/√3=86.6cm

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