質量(しつりょう)

しつりょう
noun
mass (physics)
1. mass (physics)
The quantity of matter in a body, a fundamental property in physics. Distinguished from weight, which varies with gravity. Composed of 質 (quality/substance) + 量 (quantity).
この物体(ぶったい)の質量(しつりょう)は五(ご)キログラムだ。
The mass of this object is five kilograms.
月(つき)では重力(じゅうりょく)が弱(よわ)いが、質量(しつりょう)は変(か)わらない。
Gravity is weaker on the moon, but mass doesn't change.
太陽(たいよう)の質量(しつりょう)は地球(ちきゅう)の約(やく)三十三万(さんじゅうさんまん)倍(ばい)もある。
The mass of the sun is about 330,000 times that of the earth.

USAGE:
質量(しつりょう) is a scientific term used in physics, chemistry, and related fields. In everyday language, 重(おも)さ (weight) is more commonly used, though technically 質量(しつりょう) and 重(おも)さ are different concepts.

COMMON COLLOCATIONS:

  • 質量(しつりょう)を測(はか)る (measure the mass)
  • 原子(げんし)質量(しつりょう) (atomic mass)
  • 質量(しつりょう)保存(ほぞん)の法則(ほうそく) (law of conservation of mass)
  • 質量(しつりょう)の単位(たんい) (unit of mass)

SIMILAR WORDS:
重量(じゅうりょう) means "weight" — the force exerted by gravity on an object. 体重(たいじゅう) means "body weight." In everyday speech, 重(おも)さ covers both mass and weight informally.

general
Added 2026.3.8 18:12
15500/15753_shitsuryou