翻訳と辞書 Words near each other ・ Planet 7 ・ Planet 9 ・ Planet Aid ・ Planet Airways ・ Planet Ant ・ Planet Ark ・ Plancia Magna ・ Planciusbukta ・ Planciusdalen ・ Planck (crater) ・ Planck (disambiguation) ・ Planck (spacecraft) ・ Planck angle ・ Planck charge ・ Planck constant ・ Planck energy ・ Planck epoch ・ Planck force ・ Planck length ・ Planck mass ・ Planck momentum ・ Planck particle ・ Planck Point ・ Planck postulate ・ Planck scale ・ Planck temperature ・ Planck time ・ Planck units ・ Planck's law ・ Planck's principle Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Planck energy ： ウィキペディア英語版 Planck energy In physics, Planck energy, denoted by , is the unit of energy in the system of natural units known as Planck units.〔(【引用サイトリンク】title=Planck Energy )〕 :$E\_\backslash mathrm\; =\; \backslash sqrt\}\; \backslash approx\; 1.956\; \backslash times\; 10^9\backslash \; \backslash mathrm\; \backslash approx\; 1.22\; \backslash times\; 10^\backslash \; \backslash mathrm\; \backslash approx\; 0.5433\backslash \; \backslash mathrm$ where is the speed of light in a vacuum, is the reduced Planck's constant, and is the gravitational constant. is a ''derived'', as opposed to ''basic'', Planck unit. An equivalent definition is: :$E\_\backslash mathrm\; =\; \}\},$ where is the Planck time. Also: :$E\_\backslash mathrm\; =\; ,$ where is the Planck mass. The ultra-high-energy cosmic rays observed in 1991 had a measured energy of about 50 joules, equivalent to about 2.5×10−8 . Most Planck units are fantastically small and thus are unrelated to "macroscopic" phenomena (or fantastically large, as in the case of Planck density). One , on the other hand, is definitely macroscopic, approximately equaling the energy stored in an automobile gas tank (57.2 L of gasoline at 34.2 MJ/L of chemical energy). Planck units are designed to normalize the physical constants , and to 1. Hence given Planck units, the mass-energy equivalence simplifies to , so that the Planck energy and mass are numerically identical. In the equations of general relativity, is often multiplied by 8π. Hence writings in particle physics and physical cosmology often normalize to 1. This normalization results in the reduced Planck energy, defined as: :$\backslash sqrt\}\; \backslash approx\; 0.390\; \backslash times\; 10^9\backslash \; \backslash mathrm\; \backslash approx\; 2.43\; \backslash times\; 10^\; \backslash \; \backslash mathrm.$ ==See also== *Max Planck *Planck epoch *Planck particle *Planck units *Quantum gravity *Photon energy 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「Planck energy」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.