turbulent air
31Stall (flight) — For other uses, see stall. In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded. The critical angle of attack is… …
32Lee wave — The wind flows towards a mountain and produces a first oscillation (A) followed by more waves. the following waves will have lower amplitude because of the natural damping. Lenticular clouds stuck on top of the flow (A) and (B) will appear… …
33Lee waves — In meteorology, lee waves, are atmospheric standing waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the …
34Swing bowling — is a technique used for bowling in the sport of cricket. Practitioners are known as swing bowlers . Swing bowling is generally classed as a subtype of fast bowling.Physics of swing bowlingThe essence of swing bowling is to get the cricket ball to …
35Cleanroom — For the Cleanroom software engineering methodology, see Cleanroom Software Engineering. For the meaning of clean room engineering as a method to avoid copyright infringement, see clean room design. Cleanroom used for the production of… …
36Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
37Molecular tagging velocimetry — (MTV) is a specific form of flow velocimetry, a technique for determining the velocity of currents in fluids such as air and water. In its simplest form, a single write laser beam is shot once through the sample space. Along its path an optically …
38Paper plane — This article is about toy aircraft fashioned from paper. For other uses, see Paper plane (disambiguation). Instructions for a traditional paper plane. A paper plane, paper aeroplane (UK), paper airplane (US), paper glider, paper dart or dart is a …
39climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
40temperature inversion — Meteorol. inversion (def. 12). [1940 45] * * * In meteorology, an increase of air temperature with altitude. Such an increase is a reversal of the normal temperature condition of the troposphere, where temperature usually decreases with altitude …
