Electrical (Coulomb's) and Gravitational Force are two of the four fundamental interactions in Nature. Both of them are inverse square law or the force is inversely proportional to the distance separating 2 charged mass. They have the forms of: mim2 FG = G 1-2 9192 Fe=Ke where G = 6.667 x 10-11 N m2/c2 and ke = 8.854 x 10-12 c2/N m2. Take a pair of electrons, me = 9.11 x 10 kg and q = e = -1.602 x 10-19 C. separated by a distance /= 1 m. Compare their forces ratio Fe / FG, what can you conclude about the range of Coulomb's and Gravitational Force