conservation of mass: Quick Facts

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Also Known As	conservation of matter • constant mass, law of

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Portrait of French chemist Antoine Laurent Lavoisier, shown in formal 18th-century attire with a white wig and ruffled cravat, looking slightly to his left.

Antoine Lavoisier

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Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.

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Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

Physics and Natural Law