# The pilot ascended to an altitude of 2 km. What is the atmospheric air pressure at this altitude

The pilot ascended to an altitude of 2 km. What is the atmospheric air pressure at this altitude if at the surface of the earth it is equal to 750 mm of mercury?

First, we translate the height at which the pilot is located from kilometers to meters.

Since 1 km is 1000 meters, we get:

2 * 1000 = 2000 meters.

We find the pressure difference between the height and the surface of the earth.

Since atmospheric pressure changes by 1 mm Hg. with an increase in height of 10.5 meters, the pressure difference will be:

2000 / 10.5 = 190 mm Hg

We find the value of atmospheric pressure at an altitude of 2 km.

To do this, subtract the difference from the pressure at the surface of the earth.

We get:

750 – 190 = 560 mm Hg

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