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What is atmospheric pressure?
What is a standard unit for atmospheric pressure?
What is normal atmospheric pressure at sea level?
How is atmospheric pressure measured?
What is a normal barometric pressure?
Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa), which is equivalent to 1,013.25 millibars, [1] 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. [2]
Aug 30, 2024 · Atmospheric pressure is the force per unit area exerted by a body of air above a specified area (called an atmospheric column). It is expressed in several different systems of units, including millimeters (or inches) of mercury, pounds per square inch (psi), millibars (mb), or standard atmospheres.
- The Editors of Encyclopaedia Britannica
Aug 29, 2013 · Atmospheric pressure is the force exerted against a surface by the weight of the air above the surface.
Feb 27, 2024 · In general, a normal range for barometric pressure is between 28.5 (965 millibars) and 30.7 inches (1,040 millibars) of mercury. Meteorologists have observed extreme barometric pressure readings that have gone well beyond this normal range.
Oct 19, 2023 · An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury. Atmospheric pressure drops as altitude increases.
Nov 21, 2023 · What is atmospheric pressure? Learn the definition of atmospheric, or barometric, pressure and how to distinguish between high and normal...
Normal atmospheric pressure at sea level is 14.7 pounds per square inch (psi, the units you use when you fill up your car or bike tires with air). A steel bar was passed around in the classroom. The steel bar also weighs exactly 14.7 pounds (many people think it is heavier than that).
