Compare the magnitudes of the gravitational force of attraction and the electric force of attraction between the electron and the proton in a hydrogen atom.
a) According to Newtonian mechanics, what is the gravitational force (in Newtons) between a proton and an electron?
b) Using Coulomb's law, what is the electric force (in Newtons) between a proton and an electron?
c) Find the ratio of the electric force to the gravitational force. Which force is stronger?