Im currently studying A2 physics and Im doing potentials and electric fields etc. Ive learnt about Coulombs Law etc. and Im having difficulty rearranging the formulae. For example take Coulombs Law. I had to rearrange it for Q2 and I spent ages just trying to rearrange it as I dont know how to do it properly. I used to just use the triangle or learn the expressions. Could someone explain me how to arrange coulombs law for q2 or for R. Thank You Much appreciated.