A barometer with a brass scale reads 755 mm on a day when the temperatures is `25^@C`. If the scale
Channel: Doubtnut
Date: 2020-07-26

A barometer with a brass scale reads 755 mm on a day when the temperatures is `25^@C`. If the scale is correctly graduated at `0^@C`, find the true pressure at `0^@C` (interms of height of Hg) given that the coefficient of linear expansion of brass is `18xx10^(-6)//K`. Coefficient of cubical expansion of mercury`=182xx10^(-6)//K`.