conservation of mass patâyeš-e jerm Fr.: conservation de masse A → principle of → classical physics whereby → matter can be neither created nor destroyed. Matter can, however, be → converted into → energy, as predicated by the theory of → special relativity. Also called → conservation of matter. → conservation; → mass. |
conservation of mass and energy patâyeš-e jerm o kâruž Fr.: conservation de masse et d'énergie A principle, resulting from Einstein's theory of → special relativity whereby in any → closed system the sum of mass and energy remains → constant. → conservation; → mass; → energy. |