Mercury Barometer Diagram. Unpack the unique properties of gases, their kinetic energy, and their ability to exert pressure on surroundings. A barometer is an instrument used to measure atmospheric pressure.
In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured. It reads 74.0 cm when the atmospheric pressure is 76.0 cm of mercury and reads 72.10 cm when the.