The mine is 200 m deep, atmospheric pressure is 752 mm Hg. Find the pressure at the bottom of the shaft.

Before starting this task, remember the following rule: with a decrease in altitude for every 10 meters, atmospheric pressure will rise by 1 mm Hg. With its help, we can find out how the pressure will change. To do this, do the following:

200 ÷ 10 = 20 mm Hg

Having determined how many marks the pressure will rise, we can calculate what it will be equal to at the bottom of the mine. Means,

752 + 20 = 772 mm Hg

Thus, at the bottom of the mine, the barometer will show 772 mm Hg.