For a nuclear reactor, 48 kJ of energy is produced per minute. If the energy released per fission is 3.2 × 10-11 J, then the number of fission which would be taking place in a reactor per second is
Total energy released per minute = 48 kJ
= 48 × 103 J
Energy produced per second
= 0.8 × 103 J
Energy release per fission = 3.2 x 10-11 J
Therefore number of fission per second is 2.5x1013.
So the correct answer is D.
When the material P mined from the earth is heated strongly in an insufficient supply of air, it produces a solid fuel Q which mainly consist of carbon. When another material R obtained from trees is heated in an insufficient supply of air, it produces another solid fuel S which also consists mainly of carbon. Then, which of the following is true?