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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 Water content ： ウィキペディア英語版 Water content Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, fruit, or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation. It can be given on a volumetric or mass (gravimetric) basis. ==Definitions== Volumetric water content, θ, is defined mathematically as: :$\backslash theta\; =\; \backslash frac\; =\; V\_h\; +\; V\_w\; +\; V\_a$ is the volume of wet material, that is, host material (e.g., soil particles, vegetation tissue) volume + water volume + air space. Gravimetric water content is expressed by mass (weight) as follows: :$u\; =\; \backslash frac$ where $m\_w$ is the mass of water and $m$ is the mass of the substance. Normally the latter is taken before drying: :$u\text{'}\; =\; \backslash frac\{m\_\backslash text\{dry\}\}$ To convert gravimetric water content to volumetric water content, multiply the gravimetric water content by the bulk specific gravity of the material. 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「Water content」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.