Before a nuclear reaction, there is 0.0100 kg of uranium. After the nuclear reaction, there is 0.0090 kg of uranium. How much energy was released?
(Points : 5)
5.0 × 10^-4 J

1.5 × 10^5 J

4.5 × 10^13 J

9.0 × 10^13 J

Question

Before a nuclear reaction, there is 0.0100 kg of uranium. After the nuclear reaction, there is 0.0090 kg of uranium. How much energy was released?
(Points : 5)
       5.0 × 10^-4 J

       1.5 × 10^5 J

       4.5 × 10^13 J

       9.0 × 10^13 J

michele_laino · Answer

here we have to apply the Einstein's relationship:
$$\Large  E = \Delta m \times {c^2}$$

michele_laino · Answer

where \Delta m = 0.01-0.009=...
and c=3*10^8 m/sec

anonymous · Answer

Ok thanks