- relative air density
- Экология: относительная плотность воздуха
Универсальный англо-русский словарь. Академик.ру. 2011.
relative air density
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Density of air — The density of air, ρ (Greek: rho) (air density), is the mass per unit volume of Earth s atmosphere, and is a useful value in aeronautics and other sciences. Air density decreases with increasing altitude, as does air pressure. It also changes… … Wikipedia
Density — This article is about mass density. For other uses, see Density (disambiguation). The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ (the Greek letter rho). In some cases… … Wikipedia
Air Movement and Control Association — The Air Movement and Control Association International, Inc. (AMCA; pronounced Am Cah ) is a nonprofit organization that creates standards for, tests, and rates Heating, Ventilating, and Air Conditioning (HVAC) equipment. It is best known for its … Wikipedia
Relative density — Relative density, sometimes called specific density, is the ratio of the density of a substance to the density of a given reference material. If a substance s relative density is less than one then it is less dense than the reference; if greater… … Wikipedia
Air pollution dispersion terminology — describes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling. Governmental environmental protection agencies (local, state, province and national) of many countries have… … Wikipedia
Air France Flight 447 — F GZCP, the aircraft involved in the accident Accident summary Date 1 June 2009 … Wikipedia
relative — adj. & n. adj. 1 considered or having significance in relation to something else (relative velocity). 2 (foll. by to) having existence only as perceived or considered by (beauty is relative to the eye of the beholder). 3 (foll. by to)… … Useful english dictionary
relative density — noun the ratio of the density of something to the density of a standard • Hypernyms: ↑density, ↑denseness • Hyponyms: ↑specific gravity, ↑vapor density, ↑vapour density * * * ˌrelative ˈdensity 7 [relative dens … Useful english dictionary
Air parcel — An air parcel is an imaginary volume of air used by meteorologists to conceptualize the thermodynamic fluid motions of the atmosphere for use in weather forecasting. For mathematical simplicity, an air parcel is usually considered a rigid cube… … Wikipedia
air( )speed — The speed of an aircraft relative to its surrounding air mass. The term air speed can mean any one of the following: indicated air speed, calibrated air speed, equivalent air speed, and true air speed. Indicated air speed (indicated air speed) or … Aviation dictionary
air bath — Vapor Va por, n. [OE. vapour, OF. vapour, vapor, vapeur, F. vapeur, L. vapor; probably for cvapor, and akin to Gr. ? smoke, ? to breathe forth, Lith. kvepti to breathe, smell, Russ. kopote fine soot. Cf. {Vapid}.] [Written also {vapour}.] [1913… … The Collaborative International Dictionary of English
