What do you mean by barometric hectopascals, barometric hectopascals, barometric units hectopascals and hectopascals?
Short for atmospheric pressure. Is the atmospheric pressure acting on the unit area, equal to the weight of the vertical air column extending upward to the upper limit of the atmosphere on the 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.
Extended data:
The average pressure at sea level is about101.325 kpa (76 cm Hg), which is also called standard atmospheric pressure. In addition, in chemical calculation, the international unit of air pressure is "atm". A standard atmospheric pressure is 1 atmosphere. 1 standard atmospheric pressure is equal to101325pa,1.01325bar, or 76cm Hg.
The regional difference of atmospheric pressure is one of the direct causes of meteorological changes. Air pressure is an important variable in weather forecast. On the earth, its source is the gravity of air in the atmosphere, and the normal air pressure is generally 1 kg/cm2. The atmosphere at high places is thin, where the air gravity is smaller than that at low places, so the air pressure at high places is lower than that at low places. For example, the air pressure in high mountains is lower than that at sea level.
People's use of air pressure refers to the use of compressed gas to transfer energy to do work, and the use of air pressure as power. Simply put, compressed air is the power source of cylinders and pneumatic motors through air pressure.
Baidu encyclopedia-air pressure