Acarmaker has designed a car that can reach a maximum acceleration of 12 meters per second the cars mass is 1515 assuming the same engine is used what should the cars mass be if the carmaker wants it to reach an acceleration of 15meters/second

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?