12.3 newtons third law of motion and momentum ws ignore what I already wrote down
on the backside because I have no idea if its correct or not haha. our teacher did not explain it at all so I have no idea what I am doing. ​

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?