Aconstruction worker dropped a brick from a high scaffolding. how fast was? a. how fast was the brick moving after 4.0 s of falling? b. how far did the brick fall after 4.0 s of falling?

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?