In the world pond hockey tournament held in plaster rock, nb, a puck on the ice travels 20.0 m [25° w of n], gets deflected, and travels 30.0 m [35° n of w]. determine where the puck will end up with respect to its starting point, e. g., the puck's total displacement, using the three different methods discussed.

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?