SOLVED thank you for the help 1. The problem statement, all variables and given/known data The total thermal power generated in a nuclear power reactor is 1.5 GW. How much uranium-235 does it consume in a year? ANSWER m(235U)=-----kg 2. Relevant equations E=mc2 3. The attempt at a solution E=mc2 1.5*109J*60sec*60min*24hr*365days=m*(3*108m/s)2 Solving for m leaves me with .53 kg which come up incorrect in Mastering Physics.