13. Dua benda bermuatan listrik masing- masing 60 Coulomb dan 40 Coulomb diletakkan pada jarak 40 cm. Apabila tetapan Coulomb 9times 10^9Nm^2/C^2 maka gaya tolak-menolak yang terjadi sebesar __ N. a. 135times 10^9 b. 1,35times 10^10 C. 1,35times 10^12 d. 1,35times 10^14

b. 1,35×10^10

The question is related to Coulomb's Law, which describes the force between two point charges. Coulomb's Law is given by the formula: where:- is the force between the charges,- is Coulomb's constant ( ),- and are the magnitudes of the two charges,- is the distance between the charges.Given in the question:- ,- ,- (conversion from cm to meters is necessary as Coulomb's constant is in meter units).Substituting these values into Coulomb's Law formula: Calculating this will give us the force in Newtons.