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This is College Physics Answers
with Shaun Dychko.
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In a nuclear fusion reaction,
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2 grams of hydrogen is converted into
1.985 grams of helium
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and what is the energy released?
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The energy released will be this
difference in mass
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between the reactance and the products
times *c squared*.
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So that's 2 grams minus 1.985 grams
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converted into kilograms by multiplying by
1 kilogram for every 1000 grams
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and then multiplied by the speed of light
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and that's 2.998 times 10 to the 8
meters per second squared
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and that's 1.35 times 10 to the 12 joules.
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The answer is (c).