Katana VentraIP

Mass

Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different masses. Mass in modern physics has multiple definitions which are conceptually distinct, but physically equivalent. Mass can be experimentally defined as a measure of the body's inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied.[1] The object's mass also determines the strength of its gravitational attraction to other bodies.

This article is about the scientific concept. For the main liturgical service in some Christian churches, see Mass (liturgy). For other uses, see Mass (disambiguation).

Mass

m

kilogram

yes

yes

Katana VentraIP

$_$_$DEEZ_NUTS#0__titleDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#0__subtitleDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#3__descriptionDEEZ_NUTS$_$_$

The International System of Units (SI) unit of mass is the kilogram (kg). The kilogram is 1000 grams (g), and was first defined in 1795 as the mass of one cubic decimetre of water at the melting point of ice. However, because precise measurement of a cubic decimetre of water at the specified temperature and pressure was difficult, in 1889 the kilogram was redefined as the mass of a metal object, and thus became independent of the metre and the properties of water, this being a copper prototype of the grave in 1793, the platinum Kilogramme des Archives in 1799, and the platinum-iridium International Prototype of the Kilogram (IPK) in 1889.


However, the mass of the IPK and its national copies have been found to drift over time. The re-definition of the kilogram and several other units came into effect on 20 May 2019, following a final vote by the CGPM in November 2018.[4] The new definition uses only invariant quantities of nature: the speed of light, the caesium hyperfine frequency, the Planck constant and the elementary charge.[5]


Non-SI units accepted for use with SI units include:


Outside the SI system, other units of mass include:

$_$_$DEEZ_NUTS#6__heading--0DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#6__description--0DEEZ_NUTS$_$_$

the (t) (or "metric ton"), equal to 1000 kg

tonne

the (eV), a unit of energy, used to express mass in units of eV/c2 through mass–energy equivalence

electronvolt

the (Da), equal to 1/12 of the mass of a free carbon-12 atom, approximately 1.66×10−27 kg.[note 2]

dalton

$_$_$DEEZ_NUTS#6__titleDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#6__descriptionDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__titleDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__subtextDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__quote--0DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__name--0DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__company_or_position--0DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__quote--1DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__name--1DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__company_or_position--1DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__quote--2DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__name--2DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__company_or_position--2DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__quote--3DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__name--3DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#10__company_or_position--3DEEZ_NUTS$_$_$

Francisco Flores (6 February 2012). . Stanford Encyclopedia of Philosophy.

"The Equivalence of Mass and Energy"

Gordon Kane (27 June 2005). . Scientific American. Archived from the original on 10 October 2007.

"The Mysteries of Mass"

L.B. Okun (2002). "Photons, Clocks, Gravity and the Concept of Mass". Nuclear Physics B: Proceedings Supplements. 110: 151–155. :physics/0111134. Bibcode:2002NuPhS.110..151O. doi:10.1016/S0920-5632(02)01472-X. S2CID 16733517.

arXiv

(13 May 2001). "The Origin of Mass and the Feebleness of Gravity" (video). MIT Video.

Frank Wilczek

; et al. (2012). "Does mass change with velocity?".

John Baez

; et al. (2008). "What is the mass of a photon?".

John Baez

$_$_$DEEZ_NUTS#1__titleDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__subtextDEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--0DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--1DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--2DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--3DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--4DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--5DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--6DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--7DEEZ_NUTS$_$_$

$_$_$DEEZ_NUTS#1__answer--8DEEZ_NUTS$_$_$