Astudent moved up north along vector v1 and north east along vector v2 as shown in the diagram. if the magnitude of v1 is 7, x=4, and y=3 determine the magnutude of v2, the magnitude of r and the direction of r

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?