high-temperature air
121Chevrolet Bel Air — See also 57 Chevy Chevrolet Bel Air 1957 Chevrolet Bel Air Convertible Manufacturer Chevrolet Division of General Motors Production …
122Ultra high vacuum — (UHV) is the vacuum regime characterised by pressures lower than about 10−7 pascal or 100 nanopascals ( 10−9 torr). UHV requires the use of special materials in creating the vacuum system, extreme cleanliness to maintain the vacuum system, and… …
123Saharan Air Layer — The Saharan Air Layer (SAL) is an intensely dry, warm and sometimes dust laden layer of the atmosphere which often overlies the cooler, more humid surface air of the Atlantic Ocean. In the Sahara Desert region of North Africa, where it originates …
124Thermoacoustic hot air engine — Thermoacoustic hot air engines (Sonic heat pump and refrigeration or thermoacoustic heat pump and refrigeration) of which nearly all are thermoacoustic stirling engines is a technology that uses high amplitude sound waves in a pressurized gas to… …
125Hot and high — In aviation, hot and high refers to very warm climates or very high elevations that may compromise an aircraft s ability to operate safely.Air density decreases with increasing temperature and altitude. Lower air density reduces the amount of… …
126Wet Bulb Globe Temperature — The Wet Bulb Globe Temperature (WBGT) is a composite temperature used to estimate the effect of temperature, humidity, and solar radiation on humans. It is used by industrial hygienists, athletes, and the military to determine appropriate… …
127Uruguayan Air Force Flight 571 — A similar Fairchild FH 227D painted as Fuerza Aérea Uruguaya, flight 571. Aircraft in photo was used in the 1993 movie Alive. Accident summary …
128Polar high — The polar highs are areas of high atmospheric pressure around the north and south poles. The cold temperatures in the polar regions cause air to descend to create the high pressure (a process called subsidence), just as the warm temperatures… …
