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A 66 kiloton atomic bomb is fuelled with pure 235 U, 4.0% of which actually undergoes fission. [i] How much uranium is in the bomb? [ii] How many fission fragments are produced? [iii] How many neutrons generated in the fissions are released to the environment? (On an average, each fission of 235 U produces 2.5 neutrons. A bomb’s rating is the magnitude of the released energy, specified in terms of the mass of TNT required to produce the same energy release. One megaton [10 6 tons] of TNT releases 2.6 × 10 28 MeV of energy.)

A 66 kiloton atomic bomb is fuelled  with pure 
235
U, 4.0% of which actually undergoes 
fission. [i] How much uranium is in the bomb? [ii] How many fission fragments are 
produced? [iii]  How many neutrons generated in the fissions are released to the 
environment? (On an average, each fission of 
235
U produces 2.5 neutrons.  A bomb’s 
rating is the magnitude of the released energy, specified in terms of the mass of TNT 
required to produce the same energy release. One megaton [10
6
tons] of TNT releases 
2.6 × 10
28
MeV of energy.)

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