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Physics -thermal properties of matter.?
A brass scale of barometer gives correct reading at 2 degree celsius .Coefficient of thermal expansion is 0.00002/ degree celsius. The barometer reads 75 cm at 27 degree celsius.What is the atmospheric pressure at 2 degree celsius?
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- Old Science GuyLv 71 decade agoFavorite Answer
the barometer reading is high by 0.00002 * 25
subtract that from the reading to get the correct value at 2 deg
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