Four-momentum (1947 bytes)
1: ...]] that replaces classical [[momentum]]; the four-momentum of a [[particle]] is defined as the particle's [[...
8: Calculating the [[norm]] of the momentum-energy quad-vector we obtain:
10: ...nstant we may say that the [[norm]] of the four-[[momentum]] vector is equal to the body's [[mass]]; althoug...
12: The conservation of the '''four-momentum''' yields 3 laws of "classical" conservation:
14: # The classical [[momentum]] is conserved.

Momentum (4449 bytes)
1: In [[physics]], '''momentum''' is a physical quantity related to the [[veloci...
3: ...not asymptotically [[Minkowski space|Minkowski]], momentum isn't defined at all.
5: == Momentum in classical mechanics ==
7: In [[classical mechanics]], momentum (traditionally written as '''p''') is defined as ...
12: The change in momentum, called the [[impulse]], is equal to force times ...

Angular momentum (7807 bytes)
1: ...oice, one must be careful when discussing angular momentum to specify the origin and not to combine angular ...
4: == Angular momentum in classical mechanics ==
8: ...raditional mathematical definition of the angular momentum of a particle about some origin is:
14: '''L''' is the angular momentum of the particle,
18: '''p''' is the linear momentum of the particle.

Code momentum (674 bytes)
1: ... to change course. Minimizing dependencies limits momentum and makes it easier to change course.
3: The [[adapt to adapt]] article has an anti code momentum checklist.
5: Code momentum is an example of an [[anti-pattern]].

Technological momentum (3653 bytes)
1: '''Technological momentum''' is a theory about the relationship between [[t...
7: ''Technological momentum'' takes the two models and adds ''time'' as the u...
12: Thomas P. Hughes, "Technological momentum," in Albert Teich, ed., ''Technology and the Futu...

Momentum wheel (2113 bytes)
1: ...arily by [[spacecraft]] to change their [[angular momentum]] without using fuel for [[rocket]]s or other rea...
3: ...ion, it can then halt its rotation by braking the momentum wheels by the same amount.
5: ... would come apart, and therefore how much angular momentum it can store.
7: ...ges in a spacecraft's attitude. For this reason, momentum wheels are often used to aim spacecraft with came...
9: ...t rocket|monopropellant attitude jets]] to cancel momentum wheels, as well as for fast pointing.

Momentum (album) (945 bytes)
1: ...mentum.jpg|frame|[[Cover art]] for "Momentum"]]'''Momentum''' is the first album released by [[Toby McKeehan...
13: # Momentum

Relative angular momentum (1348 bytes)
1: ...)]] of (<math>m_2\,\!</math>)'s relative [[linear momentum]]:
11: ...sually used to derive [[specific relative angular momentum]] (<math>\mathbf{h}\,\!</math>):
17: *[[Specific relative angular momentum]]
18: *[[Linear momentum]]
19: *[[Momentum (physics)]]

Energy-momentum density (5337 bytes)
1: ...ress tensor, this charge is the [[momentum|energy-momentum]] of the field.
21: == Examples of energy-momentum tensors ==
23: ...ho</math> and pressure <math>p</math>, the energy-momentum tensor has components,
27: ...al case when <math>p=0</math>, we have the energy-momentum tensor for [[dust]]:
31: ... Maxwell's theory of electromagnetism, the energy-momentum tensor may be written as:

Angular momentum coupling (3817 bytes)
2: ...r momentum]] of bodies can interact in '''angular momentum coupling'''. These interactions in atoms are used...
5: ... of the [[spin (physics)|spin]] and the [[Angular momentum]].
10: ...pling, is used for light atoms. The total angular momentum is J = L + S, where L = &Sigma;L_i are ...
13: ... is separate coupling of spin and orbital angular momentum for each electron. It is used for large atoms. J ...
16: ...e coupling of the [[spin (physics)|spin]] angular momentum states of particles. [[NMR|H-NMR]] depends on the...

Proof of angular momentum (1629 bytes)
1: ... is equal to the time-[[derivative]] of [[angular momentum]] can be stated as follows:
3: The definition of angular momentum for a single particle is:
11: ...tion]] '''a''' = ''d'''''v'''/''dt'' and linear [[momentum]] '''p''' = ''m'''''v''', we can see that:

Specific relative angular momentum (1755 bytes)
1: ... per [[unit]] [[mass]]. Specific relative angular momentum plays a pivotal role in definition of [[orbit equ...
6: [[Specific relative angular momentum]] (<math>\mathbf{h}\,\!</math>)is defined as [[cr...

Orbital angular momentum vector (616 bytes)
1: In [[astrodynamics]] '''Orbital angular momentum vector''' is a vector perpendicular to the [[orbi...
3: '''Orbital angular momentum vector''' is defined as:

Abraham-Minkowski Controversy (1557 bytes)
1: ...a [[physics]] debate concerning [[electromagnetic momentum]] within [[dielectric]] media. Or in simpler term...
3: ...ic fields, where Minkowski takes into account the momentum of the material also.

Stress-energy tensor (1168 bytes)
1: ...nd is therefore sometimes referred to as [[energy-momentum tensor]]. It satisfies the [[continuity equation]...
6: ...pacelike]] slice gives the [[four-momentum|energy-momentum vector]]. This tensor is the [[Noether's theorem|...
8: ...There is in fact no way to define a global energy-momentum vector in a general curved spacetime.

Doppler temperature (1205 bytes)
3: ...ge, there is just a little increase in the atom's momentum due to emission. At the temperature when this eff...

Rotational transition (1047 bytes)
1: ...y state. Likewise, when a particle gains angular momentum, a positive rotational transition is said to have...

Four-force (520 bytes)
1: ...r-vector ''a'' is defined as the change in [[four-momentum]] over the particle's own [[time]]:
7: ... [[four-velocity]], [[four-acceleration]], [[four-momentum]].

Laser cooling (1711 bytes)
3: ...emission happens many times the average amount of momentum transferred to the atom by the [[spontaneous emis...
5: ... in momentum space with steps equal to the photon momentum due to the spontaneous emission. This constitutes...

Transport phenomena (1509 bytes)
6: * [[Fluid dynamics]] (or momentum transfer)
9: For example, mass, energy, and momentum can all be transported by diffusion:
12: ...xample of momentum diffusion (the rain drop loses momentum to the surrounding air through viscous stresses a...
13: The transport of mass, energy, and momentum can also be affected by the presence of external ...

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