Question 46
Radioactivity and Nuclear PhysicsIn a fission process, the decrease in mass is 0.01%. How much energy could be obtained from the fission of 1.0g of the material? [c = 3.0 × 108ms−1]
- A.9.0 × 109J
- B.9.0 × 1010J
- C.6.3 × 1011J
- D.9.0 × 1011J
Show the answer and explanation
Answer: A (9.0 × 109J)
Explanation
Mass lost = 0.01% of 1 g = 10−7 kg. E = mc2 = 10−7 × 9 × 1016 = 9.0 × 109 J.