spring thrust
121Yakovlev Yak-141 — Yak 141 Yakovlev Yak 141 Role VTOL fighter Man …
122Spinal adjustment — { For the generic approach to manipulation of spinal joints, see Spinal manipulation. A chiropractor performs an adjustment on a patient. Spinal adjustment and chiropractic adjustment are terms used by chiropractors to describe their approaches… …
123geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
124Leon Trotsky — Infobox Officeholder name = Leon Trotsky nationality = Russian small caption = order =People s Commissar for Army and Navy Affairs term start =March 13, 1918 term end =January 6, 1925 vicepresident = deputy =Ephraim Sklyansky predecessor =Nikolai …
125Steering — For other uses, see Steering (disambiguation). Part of car steering mechanism: tie rod, steering arm, king pin axis (using ball joints). Steering is the term applied to the collection of components, linkages, etc. which will allow a vessel (ship …
126Flight control surfaces — Aircraft flight control surfaces allow a pilot to adjust and control the aircraft s flight attitude.Development of an effective set of flight controls was a critical advance in the development of the aircraft. Early efforts at fixed wing aircraft …
127Inventions in the modern Islamic world — [ Abdus Salam, the 1979 Nobel Prize in Physics recipient, include the electroweak interaction, electroweak symmetry breaking, magnetic photon, neutral current, preon, W and Z bosons, supergeometry, supermanifold, superspace and superfield.] This… …
128ancient Greek civilization — ▪ historical region, Eurasia Introduction the period following Mycenaean civilization, which ended in about 1200 BC, to the death of Alexander the Great, in 323 BC. It was a period of political, philosophical, artistic, and scientific… …
