Airplanes measure their altitude using
A)a mercury barometer.
B)an anemometer.
C)a hygrometer.
D)an aneroid barometer.
E)sextants.

Question

Quizplus · Accepted Answer

Airplanes measure their altitude using an aneroid barometer, which measures changes in air pressure. Mercury barometers are used to measure atmospheric pressure and are not practical for use on airplanes. An anemometer measures wind speed, a hygrometer measures humidity, and sextants are used for navigation and determining the position of celestial objects.

Airplanes Measure Their Altitude Using