At time t = 0, a ball is thrown with initial speed 0 at an angle θ above the horizontal. air resistance is negligible. which of the following best represents the speed of the ball as a function of time t while the ball is in flight? (a) vošin θ-gt (b) vo cos0-gt (c) cos2 θ+ (vo sine-gr)2 (e) v (vocose-gr)24(vo sine-gr)2 11. a small particle starts from rest from the origin of an xy-coordinate system and travels in the

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?