ABOUT IT Why does a hot water bottle feel warm? Molecules in the hot water bottle are moving faster than molecules in the skin. Molecules in the skin are moving faster than molecules in the hot water bottle. DONEN
Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage