About: Rapidity

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dbo:description	fizikai mennyiség (hu) physikalische Größe (de) wielkość fizyczna (pl) physical quantity, defined as arctangent of speed (divided by the speed of light) (en) fizika grando, difinita kiel arkotangento de rapido (dividita per lumrapido) (eo) quantidade física, definida como o arco tangente da velocidade (dividido pela velocidade da luz) (pt) quantitat física, definida com a arctangent de velocitat (dividida per la velocitat de la llum) (ca) аналог скорости в теории относительности (ru)
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dbo:wikiPageExternalLink	https://archive.org/details/opticalgeometryo00robbrich http://www.univ-nancy2.fr/DepPhilo/walter/papers/nes.pdf https://archive.org/details/classicalelectro0000jack_e8g9%7Curl-access=registration%7Cedition=3d%7Cyear=1999%7Corig-year=1962%7Cisbn=0-471-30932-X%7Cpublisher= https://archive.org/details/theoryofrelativi00silbrich
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rdfs:label	Rapidity (en) Rapidita (cs) Rapidität (Physik) (de) Rapidité (relativité) (fr) ラピディティ (ja) Rapidità (relatività ristretta) (it) 신속도 (ko) Быстрота (ru) Стрімкість (uk) 快度 (zh)
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