| coulomb | <physics> Standard unit of electric charge representing one mole of electrons. A single electron or proton has a charge of (+/-) 1.60217733E-19 coulombs, with an uncertainty of.30 ppm. Hence there are 6.2414E+18 electrons in a coulomb of electrons. (09 Oct 1997) |
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| coulomb collision | <physics> An interparticle collision where the Coulomb's force (electrical attraction and repulsion) is the governing force. Coulomb collisions have a number of interesting properties, but these are better described in textbooks. The interaction of the charged particles with each other's electric fields results in deflections of the particles away from their initial paths. See: Coulomb's Law, electrostatic force. (21 Jun 2000) |
| coulomb ionisation | <radiobiology> Ionisation produced by Coulomb's forces between a moving particle (projectile) and another particle it interacts/collides with (target). (09 Oct 1997) |
| coulomb's force | <radiobiology> See Coulomb's Law. Synonym: electrostatic force. (09 Oct 1997) |
| coulomb's law | <radiobiology> Force law governing the electrical interaction between charged particles. Force is proportional to (charge of first particle) (charge of second particle) / (square of separation between particles). Constant of proportionality depends on system of units used. (In SI units, it is 1/(4piepsilon_0), where epsilon_0 is the permittivity of free space, approx. 8.854 x 10^-12) (09 Oct 1997) |
| Coulter counter | <apparatus> Particle counter used for bacteria or eukaryotic cells, works by detecting change in electrical conductance of a small aperture as fluid containing cells is drawn through (the cell, a nonconducting particle, alters the effective cross-section of the conductive channel). (18 Nov 1997) |