Answer:
F = 5.625 10⁻⁷ N
Explanation:
For this exercise we use coulomb's law
F = [tex]k \ \frac{q_1q_2}{r^2}[/tex]
where k is the Coulomb constant which is equal to 9 10⁺⁹ N m² /C²
as the charge on the two spheres has the same sign, the force is repulsive,
let's calculate
F = 9 10⁹ 25 10⁻⁹ 10 10⁻⁹ / 2²
F = 5.625 10⁻⁷ N
