PH-688
Fission and fusion
Physics · Secondary 3 · Medium · Fission and fusion
In a reactor using uranium-235, why are slow neutrons more effective than fast neutrons at causing fission?
- Slow neutrons are more easily absorbed by uranium-235 nuclei
- Slow neutrons have more kinetic energy than fast neutrons
- Slow neutrons carry a positive charge that attracts the nucleus
- Slow neutrons split directly into energy without hitting nuclei
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