A teacher asks four students to go up to the chalkboard. She asks them to draw the orbit of Earth as it travels around the Sun. The teacher also asks the students to draw the diagram as
if they are looking down on the North Pole of Earth. Which student drew the BEST diagram
that reflected the teacher's instructions?

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?