*answer get ! *
to protect her new two-wheeler, iroda bike buys a length of chain. she finds that its linear density is 0.87 lb/ft. if she wants to keep its weight below 1.9 lb, what length of chain is she allowed? answer in units of ft.

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?