An airplane flies at airspeed (relative to the air) of 280 km/h . the pilot wishes to fly due north (relative to the ground) but there is a 52 km/h wind blowing southwest (direction sehgal (ts35972) – homework 3 – markert – (54390) 4 225◦ ). in what direction should the pilot head the plane (measured clockwise from north)?

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?