Which of the following is measured using a barometer?
Pressure
Pressure is correct.
A barometer is an instrument that measures atmospheric pressure, the force per unit area exerted by the column of air above a point. The mercury barometer, invented by Evangelista Torricelli in 1643, shows standard atmospheric pressure as a mercury column about 76 cm high; aneroid barometers use a sealed metal capsule instead. A falling reading usually signals stormy weather and a rising reading fair weather.
Distance is measured with tools such as an odometer or a measuring tape, speed with a speedometer, and temperature with a thermometer, so none of these is measured by a barometer.
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