Question 1
When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is
U +
n →
Xe +
Sr + 2
n
The following mass values are known:
| Xe: | 139.921620 u |
| Sr: | 93.915367 u |
| U: | 235.043924 u |
| n: | 1.008665 u |
How much energy is released in this reaction? (1 u = 931.5 MeV/
c2)
◦ 65.7 MeV
◦ 202 MeV
◦ 185 MeV
◦ 32.6 MeV
◦ 98.6 MeV
Question 2
When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is
U +
n →
Xe +
Sr + 2
n
The following mass values are known:
| Xe: | 139.921620 u |
| Sr: | 93.915367 u |
| U: | 235.043924 u |
| n: | 1.008665 u |
What mass of uranium is needed to produce a 10-kiloton yield? (1 u = 931.5 MeV/
c2 = 1.66054 × 10
-27 kg, 1-kiloton yield = 5.0 × 10
12 J)
◦ 0.57 kg
◦ 6.58 kg
◦ 1.10 kg
◦ 3.85 kg
◦ 0.66 kg
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