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.
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.