What is the coulomb force in water . wll it changei?
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In direct answer to your question, other variables change in the equation of Culoumb's Law when the medium is water instead of air or vacuum (to cause different results of the equation in water vs vacuum), but K is Culoumb's constant. It is a constant. It does not change based on the medium in question. You might be thinking of the dielectric constant, which is constant for a given medium, but varies by medium. The dielectric constant is 80.4 for water and 1 for vacuum, and has the unfortunate abbreviation of k. Culoumb's constant is often confused with the dialectric constant for that reason.
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