Two like charges of the same magnitude are 5.0 mm apart. If the force of repulsion they exert upon each other is 2.0 N, what is the magnitude of each charge? (The value of k is 9.0 * 10^9 N*m^2/C^2)   Based on the constant k given, we use Coulomb's law and solve for q, making sure we convert mm to m is because of the k, I believe.  (5 mm * m/1000 mm).  Please help me step by step to conceptually this problem?

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One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.