According to Coulomb's law, the electric force between two charged objects is inversely proportional to the square of the distance between them. This means that as the distance between the objects increases, the electric force between them decreases. The mathematical expression for Coulomb's law is:

$$F = k * \frac{|q1 * q2|}{r^2}$$

Where:

- F represents the electric force between the two objects in newtons (N).

- k is Coulomb's constant, which is approximately 8.988 × 10^9 N m^2/C^2

- q1 and q2 are the magnitudes of the charges of the two objects in coulombs (C).

- r is the distance between the centers of the two objects in meters (m).

Coulomb's law states that the electric force between two charged objects is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. This means that the electric force increases as the charges increase and decreases as the distance between them increases.