1. I take a 10 minute shower with 110_F water. My showerhead is rated at 2 gallons per minute. Water is supplied to my house at 50_F. (a) How many BTUs of heat energy are needed for me to take a shower

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?