You wanted to use your electric grill in your backyard. You need an extension cord. What will be the requirement of your extension cord in order to use your electric grill without any incidents. Base your explanation on " the resistance of a conducting wire increases with the increasing length of a wire".

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?