rest mass


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rest mass

n.
The physical mass of a body as measured by an observer who perceives the body as motionless. Rest mass is an inherent property of elementary particles. Also called invariant mass.

rest mass

n
(General Physics) the mass of an object that is at rest relative to an observer. It is the mass used in Newtonian mechanics

rest′ mass`


n.
the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body in the theory of relativity.
[1910–15]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rest mass - (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body
mass - the property of a body that causes it to have weight in a gravitational field
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
Translations
References in periodicals archive ?
Furthermore, for M in units of the proton rest mass [m.
According to this formula, one can find the momentum of the particle at certain energy and rest mass of the particle, or determine the rest mass and the type of the particle by its momentum and energy.
Each object when considered in its own rest frame has definitive rest mass and rest length, which can be considered to be characteristic of the object.
Some bodies, such as light, do not have rest mass, and, therefore, might be said not to have inertia.
Abstruse conditions like rest mass, structure, moment of spin, chemical composition, electrical charge, position relative to other objects--aspects fairly difficult to determine.
perpendicular to]] is the momentum perpendicular to the magnetic field, t is the time, m is the rest mass of the charged particle, [gamma]m is the relativistic mass of the charged particle, and q is the charge of the charged particle.
e is the elementary charge, the electron rest mass, and c the speed of light in vacuum.
The missing energy would amount to about 1 million electron volts, which is twice the rest mass of an electron, and would be a telltale signature of the mirror universe, Gninenko asserts.
If you had enough rest mass to accelerate the particles to meet the Gott condition, you would close the universe," Farhi says.
4 that the particle having a nonzero rest mass cannot go before the light when moving in the same direction in any IRF.
A neutrino with a magnetic moment, and one capable of changing from one kind to another, would also have to have a small rest mass.
Following the procedure by Oppenheimer and Volkoff [5], the matter is considered to consist of particles with rest mass [[mu].