Which of the following best describes chemical weathering? A process in which ice wears away at rocks over a long period of time
A series of changes that moves rocks from one area to another
Any small-scale event such as rain or fog
A process that changes the composition of rocks, causing them to break down

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?