E=MC2- Special Relativity Equation
E = mc2, equation in German-born physicist Albert Einstein’s theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other. Show off your knowledge with our E=MC2 pin. Hand cast in solid, lead-free pewter, our science pins have US made, military style clasp backings to keep your pin secure on a coat, hat, bag, or lanyard. Our energy pins arrive packaged on our signature presentation cards, making them ready for gift-giving!
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