…First, seven physical quantities that are mutually independent concepts are selected, namely, length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity, and the names and symbols of the units for each are given and their magnitudes are defined. These units are called base units (basic units) as they form the basis of the unit system, and the corresponding amounts of substance are called base quantities (basic quantities). The base units of the International System of Units (SI base units) are shown in Table 1. … *Some of the terminology that refers to "basic amounts" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…まず互いに独立な概念であると取り決めた七つの物理量,すなわち長さ,質量,時間,電流,熱力学温度,物質量および光度を選び,それぞれの単位の名称と記号を与え,大きさを定義する。これらの単位は単位系を構成する基礎として基本単位(基礎単位)と呼び,対応する物質量を基本量(基礎量)という。国際単位系の基本単位(SI基本単位)を表1に示す。… ※「基礎量」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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