Coulomb's law Coulomb's law in electrical theory states that the force F of attraction between two oppositely charged particles varies directly as the product of the mag- nitudes Q, and Q2 of the charges and inversely as the square of the distance d between the particles. (a) Find a formula for F in terms of Q, Q2. d, and a constant of variation k. (b) What is the effect of reducing the distance between the particles by a factor of one-fourth?

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