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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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"
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Translations
References in periodicals archive ?
This not only offered operators for charge and rest mass but also lead to an extended and elaborate definition for momentum.
In the case of charmonium [[PSI] = c[bar.c]], the rest mass equation is as follows.
The American physicist used the method of ion <<traps>>, manipulating ions with the help of quasiparticles-photons (quanta of an electromagnetic field or light that do not have a rest mass [6]).
It should be hot and dense enough to produce an immense pulse of neutrinos, amounting to about 10% of the star's rest mass. Most of the neutrinos fly clean out of the star, carrying off the vast majority of the energy released in the entire disaster.
In a 1997 paper, Woodward discusses transient rest mass fluctuations in electrical circuit components, comparing them to the change in mass of the "accelerated extended bodies" in the Nordtvelt effect.
Finance might also carry out such actions regarding the rest Mass Media.
At that time a known particle with zero mass was only the Photon, a Boson, with tsh spin but he reduced mass of a fermion or an electron in Dirac's equation and got a pair of particles with zero mass and therefore with no electric charge because if a particle has no rest mass but spin half of tsh then we are forced to assign it, zero electric charge.
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.
The smallest wavelength of EM radiation emitted by an electron is determined by the Compton wavelength [[lambda].sub.c] = h/[m.sub.0]c = 2[pi][r.sub.0]/[alpha], where h is Plank's constant, [m.sub.0] is electron rest mass, [r.sub.0] (about [10.sup.-13] m) is the classical radius of electron, and [alpha] = 1/137 is the fine structure constant.
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.
"Einstein, The Aether & Variable Rest Mass: Correcting Misunderstandings that have Made Relativity Seem Counterintuitive" is a science and mathematics discussion of the Einstein's theories from Jack Heighway who offers his own tweaks on Einstein's work to counter people in the modern scientific community who pick away at the genius's theories.