longitudinal flow
81Comparison of American football and rugby union — A comparison of American football and rugby union is possible because of the games shared origins, despite their dissimilarities. A rugby union match from the 2011 Rugby World Cup showing the sports distinguishing feature, the ball carrier leads… …
82Insect morphology — Legend of body parts Tagmata : A Head, B Thorax, C Abdomen. 1. antenna 2. ocelli (lower) 3. ocelli (upper) 4. compound eye 5. brain (cerebral ganglia) 6. prothorax …
83Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens …
84Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …
85Atmospheric circulation — is the large scale movement of air, and the means (together with the smaller ocean circulation) by which heat is distributed on the surface of the Earth. The large scale structure of the atmospheric circulation varies from year to year, but the… …
86River engineering — The Los Angeles River is extensively channelized with concrete embankments. River engineering is the process of planned human intervention in the course, characteristics or flow of a river with the intention of producing some defined benefit.… …
87Passing (racial identity) — Examples US civil rights leader Walter Francis White (who was blond haired, blue eyed, and very pale skinned), the chief executive of the NAACP from 1929 until his death in 1955, was of mixed race and mostly white ancestry. Five of his great… …
88wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …
89Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …
90Andes Mountains — Mountain system, western South America. One of the great natural features of the globe, the Andes extend north south about 5,500 mi (8,850 km). They run parallel to the Caribbean Sea coast in Venezuela before turning southwest and entering… …
