altitude barrier
1Sound barrier — In aerodynamics, the sound barrier usually refers to the point at which an aircraft moves from transonic to supersonic speed. The term came into use during World War II when a number of aircraft started to encounter the effects of compressibility …
2Flight altitude record — These are the records set for going the highest in the atmosphere from the age of ballooning onward. Some records are certified by Fédération Aéronautique Internationale. Contents 1 Fixed wing aircraft 1.1 Piston driven propeller aeroplane 1.2… …
3Carl Agar — Infobox Person name =Carlyle Clare Carl Agar birth date =birth date|1901|11|28|df=y birth place =Lion s Head, Ontario, Canada death date =Death date and age|1968|1|27|1901|11|28 death place =Victoria, British Columbia, Canada occupation = spouse …
4respiration, human — ▪ physiology Introduction the process by which oxygen is taken up and carbon dioxide discharged. The design of the respiratory system The human gas exchanging organ, the lung, is located in the thorax, where its delicate tissues are… …
5Chuck Yeager — Charles Elwood Yeager …
6Himalayas — Himalayan, adj. /him euh lay euhz, hi mahl yeuhz/, n. the, a mountain range extending about 1500 mi. (2400 km) along the border between India and Tibet. Highest peak, Mt. Everest, 29,028 ft. (8848 m). Also called the Himalaya, Himalaya Mountains …
7Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
8Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
9Track and Field Sports — ▪ 2007 Introduction World Indoor Championships. At the International Association of Athletics Federations (IAAF) world indoor championships, held in Moscow on March 10–12, 2006, Russia and the U.S. divided up a majority share of the gold… …
10Miles M.52 — Artist s impression of the Miles M.52 Role Experimental supersonic aircraft …
