Acar moves along a road that has markers every kilometer. over time, it passes the markers in shorter periods of time. which best describes the motion of the car? a the car is keeping the same direction. b the car is maintaining the same speed. c the car is increasing speed. d the car is changing direction.

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?