energy-generating boundary
81solids, mechanics of — ▪ physics Introduction science concerned with the stressing (stress), deformation (deformation and flow), and failure of solid materials and structures. What, then, is a solid? Any material, fluid or solid, can support normal forces.… …
82Utility frequency — The waveform of 230 volt, 50 Hz compared with 110 V, 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency at which alternating current (ac, also AC) is transmitted from a… …
83Hungary — /hung geuh ree/, n. a republic in central Europe. 9,935,774; 35,926 sq. mi. (93,050 sq. km). Cap.: Budapest. Hungarian, Magyarország. * * * Hungary Introduction Hungary Background: Hungary was part of the polyglot Austro Hungarian Empire, which… …
84Molecular dynamics — (MD) is a computer simulation of physical movements of atoms and molecules. The atoms and molecules are allowed to interact for a period of time, giving a view of the motion of the atoms. In the most common version, the trajectories of molecules… …
85Ameren — Corporation NYSE|AEE was created December 31, 1997 by the merger of Missouri s Union Electric Company (formerly NYSE: UEP) and the neighboring Central Illinois Public Service Company (CIPSCO Inc. holding, formerly NYSE: CIP).… …
86Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
87Tennessee — /ten euh see /, n. 1. a state in the SE United States. 4,590,750; 42,246 sq. mi. (109,415 sq. km). Cap.: Nashville. Abbr.: TN (for use with zip code), Tenn. 2. a river flowing from E Tennessee through N Alabama, W Tennessee, and SW Kentucky into… …
88Stallings theorem about ends of groups — In the mathematical subject of group theory, the Stallings theorem about ends of groups states that a finitely generated group G has more than one end if and only if the group G admits a nontrivial decomposition as an amalgamated free product or… …
89Hinduism — /hin dooh iz euhm/, n. the common religion of India, based upon the religion of the original Aryan settlers as expounded and evolved in the Vedas, the Upanishads, the Bhagavad Gita, etc., having an extremely diversified character with many… …
90China — <p></p> <p></p> Introduction ::China <p></p> Background: <p></p> For centuries China stood as a leading civilization, outpacing the rest of the world in the arts and sciences, but in the 19th and… …
