Barometric Pressure is defined as the weigh of a column of air extending from the ground up to the limits of the atmosphere. Although pressure is an invisible force, similar to gravity, it can also be measured by observing a properly set- up barometer. The barometric pressure is measured in units called either atmospheres, or bars (from barometer). The pressure can also be measured in millimeters, or in older times inches, of mercury.
This air pressure, although we cannot see it, directly affects our surroundings and weather every day. The main reason why we cannot feel barometric pressure pushing down on o
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