You walk six blocks east along 12th street, then three blocks west, then one block east, then six blocks east, then seven blocks west. let the x axis point east and have its origin at your starting point. if all blocks are equal in size, what is the x component of your displacement, in blocks?

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?