Richard wrote a list of the advantages of using any one of the six simple machines. His list is below. Which statement about simple machines is not correct?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

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?

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.