A sports car moves around a banked curve at just the right constant speed vv so that no friction is needed to make the turn. During the turn, the driver (mass mm) feels as though she weighs xx times her actual weight. Find the magnitude of the net force on the driver during the turn in terms of mm, gg, and xx.

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?