Quark
In
particle physics, the quark (pronounced ) is one of the two basic constituents of
matter (the other is the
lepton). Quarks make up
protons and
neutrons, with there being exactly three quarks within each kind of particle.There are six different types of quark, usually known as
flavors:
up,
down,
charm,
strange,
top, and
bottom. (Their names were chosen arbitrarily based on the need to name them something that could be easily remembered and used.) The strange, charm, bottom and top varieties are highly unstable and died out within a fraction of a second after the
Big Bang; they can be recreated and studied by particle physicists. The up and down varieties survive in profusion, and are distinguished by (among other things) their electric charge. It is this which makes the difference when quarks clump together to form protons or neutrons: a proton is made up of two up quarks and one down quark, yielding a net charge of +1; while a neutron contains one up quark and two down quarks, yielding a net charge of 0.
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Quake Army Knife
QuArK (aka Quake Army Knife), is a free toolkit and environment for developing
3D computer game levels for a large variety of popular games, mostly
first-person shooters using engines similar to or based on the
Quake engine by
id Software. QuArK has the ability to directly
edit maps, and to a limited extent,
models. It can import, export, and convert sounds, textures and various other game assets. It is also possible to move or change dynamic game objects without the need to recompile the whole map which makes finetuning of details much easier and quicker.
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Quark
Quark
Das Wort Quark bezeichnet:in Deutschland und in der Schweiz ein Milchprodukt (bayerisch-österreichisch Topfen); siehe
Quark (Lebensmittel)in der Physik eine bestimmte Art Elementarteilchen; siehe
Quark (Physik)eine US-amerikanische Software-Firma und Hersteller des DTP-Programms QuarkXPress; siehe
Quark Inc. und auch
QuarkXPresseine Designstudie für ein Auto; siehe
Peugeot Quarkden
MorphOS-Mikrokernelein Synonym für
Unsinneine außerirdische Figur (einen Ferengi) in der Science-Fiction-Serie Star Trek: Deep Space Nine; siehe Personen im Star-Trek-Universum: Quark
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Quark (Physik)
QuArK
Quark
Kwark
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Quark
Quark (particella)