Is the following sentence true or false? For a mechanical change in an isolated system, the mechanical energy at the beginning equals
the mechanical energy at the end of the process, as long as friction
is negligible.

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

How many atoms of nitrogen are in the chemical formula ni(w on

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?