Which of these forces can increase the effect of electric force?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.