Physics
(i) Differentiate between nuclear fusion and nuclear fission.
(ii) State one safety precaution in the disposal of nuclear waste.
Radioactivity
ICSE 2020
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Answer
(i) The difference between nuclear fusion and nuclear fission is as follows :
| Nuclear fusion | Nuclear fission |
|---|---|
| Nuclear fusion is the process of combining light nuclei to form a larger nuclei at a very high temperature and pressure with the release of energy | Nuclear fission is the process of breaking of a heavy nucleus in two nearly equal fragments with the release of energy. |
| This reaction is possible only at a very high temperature (≈ 107 K) and a very pressure. | This reaction is possible at ordinary temperature and ordinary pressure. |
(ii) The nuclear waste should be enclosed in thick casks and buried in deep underground places far from populated areas as they can be harmful.
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