A 2.0 kg box is pressed into a spring, compressing the spring by 0.75 m. The spring constant k= 500 N/m. The box is released at the bottom of a frictionless ramp as
shown below.

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?