Q1 - Q

Japanese: Q₁ - Q
Q1 - Q

...temperature is the degree of hotness or coldness, and in physical terms, it is the quantity that characterizes the thermal equilibrium state of a macroscopic object. When two objects are brought into contact, heat is transferred from the object with the higher temperature to the object with the lower temperature, until the two objects eventually reach the same temperature.
[Formation of the concept of temperature]
The concept of temperature originates from the sensation of hot and cold felt by humans on the skin. As early as the Greek period, the degree of hotness and coldness was expressed in several stages in medicine, but it was only in the early modern period that it was thought of as a continuous quantity.

*Some of the terminology explanations that mention "Q1" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…温度とは熱い冷たいの度合であり,物理的には巨視的な物体の熱平衡状態を特徴づける量である。二つの物体を接触させると,熱は温度の高いほうの物体から低いほうに移り,最終的には両者の温度は等しくなる。
[温度概念の形成]
 温度の概念は人間が皮膚で感ずる熱い,冷たいという感覚に由来する。すでにギリシア時代から熱さ,冷たさの度合をそれぞれ数個の段階で表すことが医学で行われていたが,連続的な量として考えるようになったのは近世になってからである。…

※「Q₁」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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