Aphysics major is cooking breakfast when he notices that the frictional force between his steel spatula and his teflon frying pan is only 0.200 n. knowing the coefficient of kinetic friction between the two materials, he quickly calculates the normal force. what is it? (give numeric value only)

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?