annihilation,what is it?

Answer 1

Annihilation is defined as "total destruction" or "complete obliteration" of an object;[1] having its root in the Latin nihil (nothing). A literal translation is "to make into nothing".

The act or process of annihilating.
The condition of having been annihilated; utter destruction.
Physics The phenomenon in which a particle and an antiparticle, such as an electron and a positron, meet and are converted completely to energy approximately equivalent to the sum of their masses.

In physics, the word is used to denote the process that occurs when a subatomic particle collides with its respective antiparticle. Since energy and momentum must be conserved, the particles are not actually made into nothing, but rather into new particles. Antiparticles have exactly opposite additive quantum numbers from particles, so the sums of all quantum numbers of the original pair are zero. Hence, any set of particles may be produced whose total quantum numbers are also zero as long as conservation of energy and conservation of momentum are obeyed.

During a low-energy annihilation, photon production is favored, since these particles have no rest mass. However, high-energy particle colliders produce annihilations where a wide variety of exotic heavy particles are created.

Examples of annihilation

An example of a virtual pion pair which influences the propagation of a kaon causing a neutral kaon to mix with the antikaon. This is an example of renormalization in quantum field theory— the field theory being necessary because the number of particles changes from one to two and back again.When a low-energy electron annihilates a low-energy positron (anti-electron), they can only produce two gamma ray photons, since the electron and positron do not carry enough mass-energy to produce heavier particles. However, if one or both particles carry a larger amount of kinetic energy, various other particle pairs can be produced. See electron-positron annihilation.

The annihilation (or decay) of an electron-positron pair into a single photon, e+ + e- → γ, cannot occur because energy and momentum would not be conserved in this process. The reverse reaction is also impossible for this reason, except in the presence of another particle that can carry away the excess energy and momentum. However, in quantum field theory this process is allowed as an intermediate quantum state. Some authors justify this by saying that the photon exists for a time which is short enough that the violation of energy conservation can be accommodated by the uncertainty principle. Others choose to assign the intermediate photon a non-zero mass. (The mathematics of the theory are unaffected by which view is taken.) This opens the way for virtual pair production or annihilation in which a one-particle quantum state may fluctuate into a two-particle state and back again. [citation needed] These processes are important in the vacuum state and renormalization of a quantum field theory. It also allows neutral particle mixing through processes such as the one pictured here.

Answer 2

Are you sure this is Geography?

Dictionary.com is a good site for basic definitions
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an·ni·hi·la·tion /əˌnaɪəˈleɪʃən/ [uh-nahy-uh-ley-shuhn]

–noun
1. the act or an instance of annihilating.
2. the state of being annihilated; extinction; destruction.
3. Physics.
a. Also called pair annihilation. the process in which a particle and antiparticle unite, annihilate each other, and produce one or more photons.
b. the conversion of rest mass into energy in the form of electromagnetic radiation.

Answer 3

Main Entry: an·ni·hi·late
Pronunciation: &-'nI-&-"lAt
Function: verb
Inflected Form(s): -lat·ed; -lat·ing
Etymology: Late Latin annihilatus, past participle of annihilare to reduce to nothing, from Latin ad- + nihil nothing -- more at NIL
transitive verb
1 a : to cause to be of no effect : NULLIFY b : to destroy the substance or force of
2 : to regard as of no consequence
3 : to cause to cease to exist; especially : KILL
4 a : to destroy a considerable part of b : to vanquish completely : ROUT
5 : to cause (a particle and its antiparticle) to vanish by annihilating
intransitive verb, of a particle and its antiparticle : to vanish or cease to exist by coming together and changing into other forms of energy (as photons)
- an·ni·hi·la·tion /-"nI-&-'lA-sh&n/ noun
- an·ni·hi·la·tor /-"lA-t&r/ noun
- an·ni·hi·la·to·ry /-'nI-&-l&-"tor-E/ adjective

Answer 4

When something is annihiliated it is brought to nothing=that means its ceases to exist as a structure or entity.
In reality matter cannot be annihilated, nor can energy by natural means.

Answer 5

Complete coversion of mass to energy,
leaving behind no residual mass.

In the political context,
Watch the outcome of the 08 US presidential election. Vis-a-vie the Republican party.

That's only IF you still have faith in the American pepole.

LuvUall Ba-bye.

Answer 6

Total destruction.

Answer 7

The end.

Answer 8

http://www.m-w.com/dictionary/annihilation
http://www.freesearch.co.uk/dictionary/annihilation

Answer 9

*It means "nil' ....... bringing down something to nothing ....... total destruction and absence !!!!

Answer 10

apocalypse