In a previous problem, you calculated how much energy was needed to accelerate a 2,100-kg tesla model s from 0 to 100 km/hr, and found that the value was not dependent on how long it took. however, the power is! unlike gas engines, electric engines supply equal power regardless of their speed. a tesla model s is capable of generating 345 kw of power. assuming no losses of energy to friction, what is the minimum length of time it takes to accelerate a tesla model s from rest to 100 km/hr?

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?