The grain of a wooden member forms an angle 15° with the vertical. for τxy = 253 psi, determine the in-plane shearing stress parallel to the grain and the normal stress perpendicular to the grain. (round the final answers to one decimal place.)

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?