Question 12
Radioactivity and Nuclear PhysicsThe amount of energy released when 0.5 kg of uranium is burnt completely is [c = 3 × 108 ms−1]
- A.4.5 × 1016J.
- B.1.5 × 1016J.
- C.1.5 × 108 J.
- D.4.5 × 108J.
Show the answer and explanation
Answer: A (4.5 × 1016J.)
Explanation
If all the mass becomes energy, E = mc2 = 0.5 × (3 × 108)2 = 4.5 × 1016 J.