A car of weight 1000 N is parked on a slope inclined at an angle of 20° Draw a scale diagram to work out the component of weight perpendicular
to the slope.
Choices: 940N, 60N, 1000N, 340N

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?