From Coulomb's law, the electric force is expressed as:
, where k is Coulomb's constant and r is the distance between the two charges, q1 and q2.
Two point charges, each with 0.1 C (0.1 Coulombs) of charge, are 0.1 m (0.1 meters) apart. Given that k = 9.0×109 Nm2/C2 (the proportionality constant for Coulomb's law), show that the force between the charges is 9.0×109 N.
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