Final answer:
The magnitude of the force between two charged spheres can be calculated using Coulomb's law. In this case, the magnitude of the force is 1.53 x 10^-7 N.
Step-by-step explanation:
The magnitude of the force between two charged spheres can be calculated using Coulomb's law:
F = k * (|q1 * q2| / r^2)
where F is the magnitude of the force, k is the Coulomb's constant (9 x 10^9 N m^2/C^2), q1 and q2 are the charges of the spheres (1 x 10^-7 C), and r is the separation between the centers of the spheres (0.7 m). Plugging in the values, we have:
F = (9 x 10^9 N m^2/C^2) * (|1 x 10^-7 C * 1 x 10^-7 C| / (0.7 m)^2)
F = 1.53 x 10^-7 N
Therefore, the magnitude of the force between the two charged spheres is 1.53 x 10^-7 N.