Select the correct answer. how does the law of conservation of energy apply to machines? a. machines create energy from scratch. b. machines consume energy until no energy remains. c. energy transferred to a machine equals energy transferred from it. d. engineers break the law of conservation of energy by using machines.

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?