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Change in Barometric Height with position

Biswaroop Dasgupta asks:

“How would the barometric height change when a mercury barometer is taken to a mine? Give reasons to explain.”

Answer: Barometer is a device used to determine the atmospheric pressure. The atmospheric pressure is calibrated in terms of height of mercury column in the barometer.

Atmospheric pressure is the weight of air acting normally per unit area on the surface ofof earth or the point under consideration.

Inside a mine, the weight of air above the point will be more than that on the surface of earth. Therefore, the barometric height increases when taken to a mine.

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