An electron and a positron, both at rest, annihilate. The total energy released is (c = 3 10^8 m/s):

  1. 8.2 10^-14 J
  2. 5.47 10^-22 J
  3. 1.64 10^-13 J
  4. 3.28 10^-13 J
Answer

C) 1.64 10^-13 J

E = 2mc^2 = 2 9.11 10^-31 (3 10^8)^2 = 1.64 10^-13 J. SLO P-11-F-28 · Understanding

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