two times two equals four
41logistics — /loh jis tiks, leuh /, n. (used with a sing. or pl. v.) 1. the branch of military science and operations dealing with the procurement, supply, and maintenance of equipment, with the movement, evacuation, and hospitalization of personnel, with the …
42South Africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 42,327,458; 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town. Formerly, Union of South Africa. * * * South Africa Introduction South Africa… …
43Positional notation — Numeral systems by culture Hindu Arabic numerals Western Arabic (Hindu numerals) Eastern Arabic Indian family Tamil Burmese Khmer Lao Mongolian Thai East Asian numerals Chinese Japanese Suzhou Korean Vietnamese …
44radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
45renal system — ▪ anatomy Introduction in humans (human body), organ system that includes the kidneys, where urine is produced, and the ureters, bladder, and urethra for the passage, storage, and voiding of urine. In many respects the human excretory, or… …
46Duplicate bridge — tournament playing area Duplicate bridge is the most widely used variation of contract bridge in club and tournament play. It is called duplicate because the same bridge deal (i.e. the specific arrangement of the 52 cards into the four hands) is… …
47Miss Venezuela — Formation 1952 Type Beauty pageant Headquarters Caracas, Venezuela Location …
48tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
49Ming Dynasty — Great Ming 大明 ← 1368–1644 …
50Typographical Number Theory — (also known as TNT) is a formal axiomatic system describing the natural numbers that appears in Douglas Hofstadter s book Gödel, Escher, Bach. It is an implementation of Peano arithmetic that Hofstadter uses to help explain Gödel s incompleteness …
