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The length of a faulty barometer is 90 c...

The length of a faulty barometer is 90 cm and there is a little air above the mercury. When the atmospheric pressure is 76cm of Hg it reads 74.8 cm. What will be the true atmospheric pressure if the reading on the barometer is 74.3cm ?

Text Solution

Verified by Experts

The correct Answer is:
75.46 cm of Hg
`P_(1) V_(1) = P_(2) V_(2) , 12 xx 15.2 A = ( H - 74.3) 15.7 A, H = 75. 46cm ` of Hg
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