The magnitude of the kinetic frictional force between the surface and the 5kg block is 8n. the coefficient of kinetic friction between the 2kg block and the surface is 0,31 a. calculate the magnitude of the kinetic frictional force between 2kg block and the surface

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?