A stone is thrown horizontally at 30m/s from a tall cliff. i. Calculate its horizontal position and vertical position at 2 seconds interval for the first 10 seconds.
ii. Plot a graph using positions in (i) showing trajectory of the stone

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?