Question

can Mercury barometer be used as an altimeter?

Answer 1

yes of course .......

Answer 2

Yes, mercury barometer be used as an altimeter because Barometers are instruments that measure atmospheric pressure, and altimeters are instruments that measure altitude of any place or of flying objects like aircrafts. Altimeters are of two types - pressure altimeters and radar altimeters. The pressure altimeters work on the principle that atmospheric pressure of the air decreases as the altitude decreases. These type of altimeters are essentially very sensitive barometers that are graduated to indicate altitude corresponding to different atmospheric pressure rather than pressure.

Thus it is not just that barometers can be used as altimeters, but many of the altimeters are actually barometers. It is also possible to use ordinary barometers as altimeters by reading out the atmospheric pressure from the barometer and then determining the altitude corresponding to the it.