...Its size differs between the UK and the US. (1) Imperial gallon The imperial gallon is a basic unit of volume common to both dry and liquid quantities, and is defined as "the volume of pure water which, when the water and air are at 62°F and under an atmospheric pressure of 30 inches of mercury, represents a mass of 10 avoirdupois in air relative to a brass weight." There is no set density for brass weight, but the Standards Institute adopts a value of 8.143g/cm3, and defines 1 gallon as 277.42 cubic inches. ... *Some of the terminology that mentions "Imperial gallon" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…その大きさにイギリスとアメリカの両国で差がある。(1)英ガロン 英ガロンは乾量,液量に共通な容量の基本単位で,その定義は〈水銀柱30インチの大気圧の下で水および空気が62゜Fにあるとき,黄銅分銅に対して空気中で10常用ポンドの質量を示す純粋な水の体積〉である。黄銅分銅の密度の定めはないが,標準機関では8.143g/cm3という値を採用し,1ガロンを277.42立方インチとする。… ※「英ガロン」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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