Each deuterium-tritium fusion reaction releases 2.82×10⁻¹² J. A fusion system releases a total nuclear energy of 2.82×10⁶ J. If the number of fusion reactions is N×10¹⁸, find N.
Physics · Nuclear physics · nuclear fission and fusion ,nuclear reactor
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Question

Each deuterium-tritium fusion reaction releases 2.82×10⁻¹² J. A fusion system releases a total nuclear energy of 2.82×10⁶ J. If the number of fusion reactions is N×10¹⁸, find N.

G1 Physics · Accepted Answer

Number of reactions is number of reactions = total energy ÷ energy released per reaction. Therefore, number of reactions = (2.82×10⁶) ÷ (2.82×10⁻¹²) = 10¹⁸. Thus, number of reactions = 1×10¹⁸. Hence N = 1.