Which statement is true about the geologic timescale? A. it starts with the existence of humans

B. each eon is one million years

C. time increments relate to evolution of organisms

D. each eon is one billion years

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?