Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance.
Northwestern Oklahoma State University has issued the all-clear after the campus was closed for a "potentially dangerous situation" because a questionable substance was found.
Liquid metal refers to a class of metallic materials that remain in a liquid state at or near room temperature. These materials possess unique properties, such as high electrical and thermal ...