The United States uses about 1.4 * 1019 J of electrical
Chapter 43, Problem 43.44(choose chapter or problem)
The United States uses about 1.4 * 1019 J of electrical energy per year. If all this energy came from the fission of 235U, which releases 200 MeV per fission event, (a) how many kilograms of 235U would be used per year, and (b) how many kilograms of uranium would have to be mined per year to provide that much 235U? (Recall that only 0.70% of naturally occurring uranium is 235U.)
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