The symbol k is a proportionality constant known as the Coulomb's law constant. The value of this constant is dependent upon the medium that the charged objects are immersed in. In the case of air, the value is approximately 9.0 x 109 N. read more
The Boltzmann constant provides a mapping from this characteristic microscopic energy E to the macroscopic temperature scale T = E / k. In physics research another definition is often encountered in setting k to unity, resulting in the Planck units or natural units for temperature and energy. read more
The symbol k is Coulomb's law constant (9 x 10 9 N • m 2 / C 2), Q 1 and Q 2 represent the quantity of charge on object 1 and object 2, and d represents the separation distance between the objects' centers. read more