Apower plant uses 365 gj/hr of energy from a boiler and extracts 18 gj/hr as work from a turbine and rejects the remaining energy to a large cold resevoir of air (the atmosphere). what is the rate of heat rejection to the atmosphere for this plant? give your answer in gj/hr

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?