What is the source of energy in nuclear weapons?A.CombustionB.FissionC.FusionD.Gravity

Analysis of Options

1. Combustion: This is a chemical reaction that releases energy, primarily seen in fires and engines. It does not involve nuclear reactions.
2. Fission: This is the process of splitting heavy atomic nuclei (like Uranium-235 or Plutonium-239) to release a significant amount of energy. Fission is indeed the principle used in atomic bombs.
3. Fusion: This is the process of combining light atomic nuclei (like Hydrogen isotopes) to form heavier nuclei, releasing energy. Fusion is the principle behind hydrogen bombs.
4. Gravity: This is a fundamental force of attraction between masses but does not produce energy in the context of nuclear weapons.

Conclusion

The options related to fission and fusion both represent processes used in different types of nuclear weapons. Atomic bombs rely on fission, while hydrogen bombs utilize fusion.

Final Answer

The source of energy in nuclear weapons is primarily B. Fission (for atomic bombs) and C. Fusion (for hydrogen bombs).