At the foot of the mountain, the barometer shows a pressure of 760 mm Hg. Art., and at the top 722

At the foot of the mountain, the barometer shows a pressure of 760 mm Hg. Art., and at the top 722 mm Hg. Art. Determine the height of the mountain.

First, we determine the difference in pressure of the mercury column at the top and at the foot of the mountain.

To do this, subtract 722 mm Hg from 760 mm Hg.

We get:

760 – 722 = 38 mm Hg

Since the pressure of the mercury column changes by 1 mm every 10.5 meters, the height of the mountain will be equal to:

38 * 10.5 = 399 meters.

Answer: The height of the summit is 399 meters.