1) Find the relationship between the electric force F(e) and the gravitational force F(g) (or weight) between two electrons 2)Find the force exerted between two equal 1C charges separated in air by a distance of 1 km. 3)Find the force exerted between two free electrons separated by 1 A (1 A = 10-10m; A = Amstrong). 4)Calculate the force of repulsion between two argon atomic nuclei separated in air by a distance of 1 m (millimicron = 10-9m). The electrical charge of the argon nucleus is 18 protons. 5)Two small spheres with the same charge but opposite signs are 3 cm apart, they are located in the air and they attract each other with a force of 4x10-5N. Calculate the charge of each sphere