Question

A barometer measures the pressure of the atmosphere at different altitudes. Identify the location where the column of mercury is lowest in the barometer.

Answer 1

Step-by-step explanation:

At very high altitudes of Earth's atmosphere it is observed that the column of mercury is lowest.

As we move at high altitudes in the atmosphere there is less overlying mass as a result the atmospheric pressure decreases.

Thus, it can be concluded that the column of mercury is lowest in the barometer at very high altitudes of atmosphere.

Answer 2

The location where the mercury level of the barometer would be the lowest is at the very high altitudes of the Earth's atmosphere (about 100 km), since air pressure decreases as altitude increases. Hope my answer has come to your help.