<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (September 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (September 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> Coulomb's constant, the electric force constant, or the electrostatic constant (denoted k, k or K) is a proportionality constant in electrodynamics equations . In SI units, it is exactly equal to 7009898755178736817 ♠ 8987551787. 368 1764 N m C, or roughly equaling 7009899000000000000 ♠ 8.99 × 10 N m C. It was named after the French physicist Charles - Augustin de Coulomb (1736--1806) who introduced Coulomb's law . </P> <P> Coulomb's constant is the constant of proportionality in Coulomb's law, </P>

What is the k value in coulomb's law