Suppose the total mechanical energy of an object is conserved. If the kinetic energy decreases, what must be true about the gravitational potential energy

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

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?

When a metal and an bond they do not share electrons