passwella.
Menu

JAMB Physics 2000 Question 42

Question 42

Radioactivity and Nuclear Physics

In a thermonuclear reaction, the total initial mass is 5.02 × 10−27 kg and the total final mass is 5.01 × 10−27 kg. The energy released in the process is

  1. A.9.0 × 10−10 J
  2. B.9.0 × 10−11 J
  3. C.9.0 × 10−12 J
  4. D.9.0 × 10−13 J
Show the answer and explanation

Answer: D (9.0 × 10−13 J)

Explanation

Mass lost = 0.01 × 10−27 = 10−29 kg. E = mc2 = 10−29 × (3 × 108)2 = 9.0 × 10−13 J.