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Index (K)

KA - KC

KD - KF

KG - KJ

KK - KN

KO - KR

KS - KV

KW - KZ

Moment of truth
The Sun, with a diameter of 1,392,000 km, is made of 94% hydrogen atoms.


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kainite Min.
A naturally occurring double salt of magnesium sulfate and potassium chloride (MgSO4.KCl.3H2O). It was discovered in 1865 and the named was derived from Greek kainos, meaning contemporary. The mineral has a hardness of 3 and appears transparent with yellowish tint but can also be white translucent with blue or violet coloration. It has some use as a fertilizer.

Kaluza-Klein particles Phys.
Particles that exist in our 4-dimensional (4D) world (3 spatial 1 time) that carry some kind of imprints of their higher dimensional origin. In other words, these particles appear as some extra particles in our usual 4-dimensional spacetime but are in fact originated in extra (or higher) dimensions.

Usually abbreviated as the KK particles, it is thought that they should carry extra-dimensional momentum which is manifested in the 4D world as mass, which in turn, is determined by the extra-dimensional geometry. For this reason, KK particles are also known as Kaluza-Klein modes due to their quantized momenta. KK particles have identical charges to the particle we know and with the same interaction behaviour, but with masses that are determined by extra dimensions. For example, if an electron travels in higher dimensions, it is manifested as a KK particle with the same negative charge but with a different mass than an electron travels in our 4D world.

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