nuclear-energy-handout - Nuclear Energy Mass and energy...

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Nuclear Energy Mass and energy Mass and energy • Einstein suggested that mass and energy are related by E=mc 2 (c = 3.0 x 10 8 m/s) • E: energy, m: mass, c: speed of light • Converting the mass of one penny could –provide the entire energy requirements for 700 people for one year –Power a space heater for 7000 years –That’s about $3 million worth of electricity • Because mass and energy are related the law of conservation of energy and law of conservation of mass can be combined into the Law of Conservation of Mass - Energy Fission and Fusion • Chemical reactions involve outer electrons • Nuclear reactions involve changes in nuclei • Two types of nuclear reactions are fusion and fission (others are radiation and transmutation) • Fission is when a nucleus breaks apart • Fusion involves adding nucleons to a nucleus • Fission is used in nuclear power plants and powered the first atomic bomb (21 kilotons) • Fusion powers stars and may also be used in thermonuclear bombs (60 megatons)
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