I have equation that i have to make A the subject of so the equation is F = A Q1 Q2/r2 this i have done and it becomes A = F x r2/Q1 Q2. the SI units work out as coulombs constant, however on all the web sites i have checked coulombs constant is given as K, even the equations are identical except in all of them the A is a K. Is this a British thing or can A be used instead of the K?(adsbygoogle = window.adsbygoogle || []).push({});

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# Coulombs constant

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