# rapidity

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**Velocities**— Velocity Ve*loc i*ty, n.; pl. {Velocities}. [L. velocitas, from velox, ocis, swift, quick; perhaps akin to v?lare to fly (see {Volatile}): cf. F. v[ e]locit[ e].] [1913 Webster] 1. Quickness of motion; swiftness; speed; celerity; rapidity; as,… …42

**Velocity**— Ve*loc i*ty, n.; pl. {Velocities}. [L. velocitas, from velox, ocis, swift, quick; perhaps akin to v?lare to fly (see {Volatile}): cf. F. v[ e]locit[ e].] [1913 Webster] 1. Quickness of motion; swiftness; speed; celerity; rapidity; as, the… …43

**Virtual velocity**— Velocity Ve*loc i*ty, n.; pl. {Velocities}. [L. velocitas, from velox, ocis, swift, quick; perhaps akin to v?lare to fly (see {Volatile}): cf. F. v[ e]locit[ e].] [1913 Webster] 1. Quickness of motion; swiftness; speed; celerity; rapidity; as,… …44

**fast**— I. adjective Etymology: Middle English, from Old English fæst; akin to Old High German festi firm, Old Norse fastr, Armenian hast Date: before 12th century 1. a. firmly fixed < roots fast in the ground > b. tightly shut < the drawers were fast > …45

**Homer**— This article is about the Greek poet Homer and the works attributed to him. For other meanings, see Homer (disambiguation). Homeric redirects here. For other uses, see Homeric (disambiguation). See also: English translations of Homer …46

**Non-Euclidean geometry**— Behavior of lines with a common perpendicular in each of the three types of geometry Non Euclidean geometry is the term used to refer to two specific geometries which are, loosely speaking, obtained by negating the Euclidean parallel postulate,… …47

**Master Juba**— Portrait of Boz s Juba from an 1848 London playbill Master Juba (ca. 1825 – ca. 1852 or 1853) was an African American dancer active in the 1840s. He was one of the first black performers in the United States to play onstage for white audiences… …48

**Split-complex number**— A portion of the split complex number plane showing subsets with modulus zero (red), one (blue), and minus one (green). In abstract algebra, the split complex numbers (or hyperbolic numbers) are a two dimensional commutative algebra over the real …49

**Hyperbolic angle**— A hyperbolic angle in standard position is the angle at (0, 0) between the ray to (1, 1) and the ray to ( x , 1/ x ) where x > 1.The magnitude of the hyperbolic angle is the area of the corresponding hyperbolic sector which is loge x .Note that… …50

**Ho Chi Minh Campaign**— Infobox Military Conflict conflict=Ho Chi Minh Campaign caption= partof=the Vietnam War date=13 December 1974 30 April 1975 place=Republic of Vietnam result=Decisive North Vietnamese victory, capitulation of the Republic of Vietnam combatant1=… …