Air 01
Air 01 : (1) (Geophys) The mixture of gases surrounding the earth and constituting the normal atmosphere. Air species % by volume include Nitrogen 78. 01, Oxygen 20. 95, Carbon Dioxide 0. 03, Argon 0. 93, Neon 0. 0018, Helium 0. 0005, Methane 0. 0002, Krypton 0. 0001, Hydrogen 0. 00005, Nitrous Oxide 0. 00005, Xenon 0. 000008 and Ozone 0. 00000(1) Note: The composition varies with altitude. In addition to the listed gases, various quantities of other constituents are present, chiefly water vapor and miscellaneous pollutants. Air at sea level and 00C (320P) exerts a pressure of 14. 7 pounds per square inch. Under the same conditions, a cubic foot of air weighs 0. 08 pounds. See also: Atmosphere; Air Pollution. (2) In archaic usage, any gas; e. g. , nitrous air. (3) (Commun; Fire Pr) Referring to radio communications. See: on the Air; Off the Air
No records Found