Explain how the height of the mercury column in the tube of a simple barometer is a measure of the atmospheric pressure. (This question starts with the word “Explain”, which means writing at least six sentences or 75 words. Write in your own words).
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The concept is that the atmospheric pressure in normal conditions raises the mercury column upto 76cm. This is taken as a measure when weather is normal. Now whenever the weather is getting stormy the height of mercury column will decrease which indicates falling air pressure.
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