Atoy rocket that weighs 10 n blasts straight up from ground level with an initial kinetic energy of 40 j. at the exact top of its trajectory, its total mechanical energy is 140 j. to what vertical height above the ground does it rise, assuming no air resistance?

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?