STANDARD Physics Radioactive Decay MCQ Question
A nucleus of uranium decays at rest into nuclei of thorium and helium. Then
The helium nucleus has more momentum than the thorium nucleus.
The helium nucleus has less kinetic energy than the thorium nucleus.
The helium nucleus has more kinetic energy than the thorium nucleus.
The helium nucleus has less momentum than the thorium nucleus.
Correct Answer
Detailed Explanation
According to the law of conservation of linear momentum, both nuclei have equal and opposite momentum. However, since the helium nucleus is lighter, it has more kinetic energy.
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