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Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere.
Feb 27, 2024 · Barometric pressure is a measurement of the air pressure in Earth's atmosphere. For this reason, it is also known as atmospheric pressure. The pressure is created by fluid gas molecules in the air, and it extends in all directions.
Atmospheric pressure can be measured with a mercury barometer (hence the commonly used synonym barometric pressure), which indicates the height of a column of mercury that exactly balances the weight of the column of atmosphere over the barometer.
- The Editors of Encyclopaedia Britannica
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.
Jun 15, 2020 · The air pressure at sea level at a temperature of 59°F (15°C) is equal to one atmosphere (Atm), and this is the baseline reading for determining relative pressure. Atmospheric pressure is also known as barometric pressure because it is measured using a barometer .
- Essentially, atmospheric pressure is the force exerted at any given point on the Earth’s surface by the weight of the air above that point. In shor...
- The standard unit for measuring barometric pressure is called an atmosphere (atm). In relation to the English system of measurement, one atmosphere...
- Changes in air pressure are caused by differences in air temperature above the earth, and the temperature of an air mass is determined by its locat...
- Simply put, when altitude increases, the amount of gas molecules in the atmosphere decreases (air becomes less dense), hence the term “thin air” wh...
Atmospheric pressure is measured by a barometer with a silicon capacitive pressure sensor, known for its excellent repeatability and long-term stability.
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Aug 29, 2013 · Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere. To measure that weight, meteorologists use a barometer.
