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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ram pressure ： ウィキペディア英語版 Ram pressure In physics, ram pressure is a pressure exerted on a body that is moving through a fluid medium. It causes a strong drag force to be exerted on the body. It is given by: $P=\; 1/2$ * \rho * v^2 〔Relativistic Astrophysics and Cosmology, A Fabian and Lasenby, University of Cambridge Lecture Notes, Michaelmas 2010.〕 where $P$ is the pressure, $\backslash rho$ is the density of the fluid and $v$ the relative velocity between the body and the fluid. For example, a meteor traveling through Earth's atmosphere produces a shock wave generated by the extremely rapid compression of air in front of the meteoroid. It is primarily this ram pressure (rather than friction) that heats the air that in turn heats the meteoroid as it flows around it.〔Plait, p.1〕 Galaxies in clusters experience ram pressure as they move through the intracluster medium; it is capable of stripping the galaxy of much of its interstellar gas.〔Grebel, Gallagher, Harbeck, pp.1-15〕 ==Notes== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ram pressure」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.