cyclic motion
81Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… …
82MUSIC — This article is arranged according to the following outline: introduction written sources of direct and circumstantial evidence the material relics and iconography notated sources oral tradition archives and important collections of jewish music… …
83Chamber music — For other uses, see Chamber music (disambiguation). Frederick the Great plays a flute concert in his summer palace Sanssouci; painting by Adolph Menzel Chamber music is a form o …
84Helicopter rotor — This article is about helicopter main rotor systems. For antitorque control, see tail rotor. Helicopter rotor The rotor head of a Sikorsky S 92 A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic …
85Swashplate (helicopter) — This article is about the swashplate in helicopters, see also the swashplate article which describes all uses of the mechanism. A swashplate is a device that translates the pilot s (or autopilot s) commands via the helicopter flight controls into …
86reaction mechanism — Introduction in chemical reactions (chemical reaction), the detailed processes by which chemical substances are transformed into other substances. The reactions themselves may involve the interactions of atoms (atom), molecules (molecule),… …
87Kepler problem in general relativity — The Kepler problem in general relativity involves solving for the motion of two spherical bodies interacting with one another by gravitation, as described by the theory of general relativity.Typically, and in this article, one body is assumed to… …
88Swashplate — A swashplate is a device used in mechanical engineering to translate the motion of a rotating shaft into reciprocating motion. Conversely it can translate a reciprocating motion into a rotating one and can be used to replace the crankshaft in… …
89Epicureanism — /ep i kyoo ree euh niz euhm, kyoor ee /, n. 1. the philosophical system or doctrine of Epicurus, holding that the external world is a series of fortuitous combinations of atoms and that the highest good is pleasure, interpreted as freedom from… …
90United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
