What is the atmospheric pressure in Pa?

The atmospheric pressure is 0. 10 13MPa.

Atmospheric pressure is the atmospheric pressure acting on a unit area, that is, it is numerically equal to the gravity of a vertical air column extending upward to the upper limit of the atmosphere. The famous experiment in the Madeborg hemisphere proved its existence. The international system unit of air pressure is Pascal, abbreviated as Pa, and the symbol is PA.

In meteorology, people usually use kilopascals (kPa) or hectopascals (hpa) as units. Other commonly used units are: bar, 1 bar = 100000 pa and centimeter mercury (or centimeter mercury). Air pressure varies not only with height, but also with temperature. The change of air pressure is closely related to the change of weather.

Air pressure is the abbreviation of atmospheric pressure, which is the atmospheric pressure acting on unit area, that is, it is equal to the weight of the vertical air column extending upward to the upper limit of the atmosphere on unit area. Air pressure is related to altitude, temperature and other conditions. It generally decreases with the increase of height. In the horizontal direction, the difference of atmospheric pressure leads to the flow of air.

A unit of air pressure, usually the height of a mercury column. For example, a standard atmospheric pressure is equal to the pressure generated by a mercury column with a height of 760mm, which is equivalent to1.0336kg atmospheric pressure on an area of one square centimeter.

Internationally, "hectopascals" are used as the air pressure unit. After conversion: a standard atmospheric pressure = 10 13 hectopascals (millibars). The annual average pressure in Shenzhen is 1009.8 hectopascals.

Atmospheric pressure refers to bearing the weight of atmospheric column per unit area. Meteorology is often expressed in millibars or millimeters of mercury. The standard atmospheric pressure is 10 13.2 mbar, or equivalent to 760 mm high mercury.

Because the higher the ground is, the lower the air pressure is, so the height can be calculated according to the vertical change of air pressure. In the horizontal direction, the difference of air pressure will cause airflow, so it is one of the important meteorological elements for analyzing weather forecast.

From the point of view of air molecular motion, it is the result of the comprehensive action of air molecular motion and the gravity field of the earth. Under this comprehensive action, the impact force exerted by many air molecules per unit area on the plane at every moment is expressed as air pressure. Where the density of air molecules is high, the average kinetic energy of air molecules is also high. So the impact is big, so the air pressure is also big.