Mass

The mass of an object is a measure of an object's resistance to acceleration, sometimes also called "inertia". A mountain has typically more mass than a rock, for instance. Mass should not be confused with the related but quite different concept of weight. A large mass like the Earth will attract a small mass like a human being with enough force to keep the human being from floating away. "Mass attraction" is another word for gravity, a force that exists between all matter.

Units of mass

The unit of mass in the International System of Units is the kilogram, which is represented by the symbol 'kg'. Fractions and multiples of this basic unit include the gram (one thousandth of a kg, symbol 'g') and the tonne (one thousand kg), amongst many others.

In some fields or applications, it is convenient to use different units to simplify the discussions or writings. For instance,

  • Atomic physicists deal with the tiny masses of individual atoms and measure them in atomic mass units.
  • Jewelers normally work with small jewels and precious stones where masses are traditionally measured in carats, which correspond to 200 mg or 0.2 g.
  • The masses of stars are very large and are sometimes expressed in units of Solar masses.

Traditional units are still in encountered in some countries: Imperial units such as the ounce or the pound were in widespread use within the British Empire. Some of them are still popular in the United States, which also uses units like the short ton (2,000 pounds, 907 kg) and the long ton (2,240 pounds), not to be confused with the metric tonne (1,000 kg).

Other Languages
Afrikaans: Massa
Alemannisch: Masse (Physik)
አማርኛ: ግዝፈት
العربية: كتلة
aragonés: Masa
অসমীয়া: ভৰ
asturianu: Masa
Avañe'ẽ: Mba'era'ã
বাংলা: ভর
Bân-lâm-gú: Chit-liōng
башҡортса: Масса
беларуская: Маса
беларуская (тарашкевіца)‎: Маса
български: Маса
Boarisch: Massn
bosanski: Masa
brezhoneg: Mas
буряад: Масса
català: Massa
čeština: Hmotnost
chiShona: Huremu
Cymraeg: Màs
eesti: Mass
Ελληνικά: Μάζα
English: Mass
español: Masa
Esperanto: Maso
estremeñu: Massa
euskara: Masa
Fiji Hindi: Mass
français: Masse
Gaeilge: Mais
Gaelg: Glout
Gàidhlig: Tomad
galego: Masa
贛語: 質量
ગુજરાતી: દ્રવ્યમાન
客家語/Hak-kâ-ngî: Tsṳt-liông
한국어: 질량
հայերեն: Զանգված
हिन्दी: द्रव्यमान
hrvatski: Masa
Ido: Maso
Ilokano: Masa
Bahasa Indonesia: Massa
íslenska: Massi
italiano: Massa (fisica)
עברית: מסה
Basa Jawa: Massa
ქართული: მასა
қазақша: Масса
Kiswahili: Masi
Kreyòl ayisyen: Mas inèsi
kurdî: Bariste
Кыргызча: Масса
Latina: Massa
latviešu: Masa
Lëtzebuergesch: Mass (Physik)
lietuvių: Masė
Limburgs: Massa
lingála: Libóndó
lumbaart: Massa
magyar: Tömeg
македонски: Маса
മലയാളം: പിണ്ഡം
मराठी: वस्तुमान
Bahasa Melayu: Jisim
Mìng-dĕ̤ng-ngṳ̄: Cék-liông
монгол: Масс
မြန်မာဘာသာ: ဒြပ်ထု
नेपाली: पिण्ड
日本語: 質量
Nordfriisk: Mase
norsk: Masse
norsk nynorsk: Masse
Novial: Mase
occitan: Massa
oʻzbekcha/ўзбекча: Massa
ਪੰਜਾਬੀ: ਪੁੰਜ
پنجابی: وزن
Patois: Mas
Piemontèis: Massa (fìsica)
Plattdüütsch: Masse (Physik)
português: Massa
Ripoarisch: Masse
română: Masă
Runa Simi: Wisnu
русиньскый: Вага
русский: Масса
Scots: Mass
Seeltersk: Masse
shqip: Masa
sicilianu: Massa
සිංහල: ස්කන්ධය
slovenčina: Hmotnosť
slovenščina: Masa
ślůnski: Masa
Soomaaliga: Cuf
کوردی: بارستە
српски / srpski: Маса
srpskohrvatski / српскохрватски: Masa
Basa Sunda: Massa
suomi: Massa
svenska: Massa
Tagalog: Masa
தமிழ்: திணிவு
татарча/tatarça: Massa
తెలుగు: ద్రవ్యరాశి
ไทย: มวล
тоҷикӣ: Масса
Türkçe: Kütle
українська: Маса
اردو: کمیت
vèneto: Masa
Tiếng Việt: Khối lượng
Winaray: Masa
吴语: 質量
ייִדיש: מאסע
粵語: 質量
中文: 质量
Kabɩyɛ: Hɩlɩmɩyɛ
Lingua Franca Nova: Masa