A nucleus splits into two fragments whose speeds are in the ratio 2:1. What is the ratio of their nuclear radii?
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A nucleus splits into two fragments whose speeds are in the ratio 2:1. What is the ratio of their nuclear radii?

G1 Physics · Accepted Answer

Momentum conservation gives M₁v₁=M₂v₂. If v₁:v₂=2:1, then M₁:M₂=1:2. Nuclear radius R∝A¹ᐟ³∝M¹ᐟ³, hence R₁:R₂=1:2¹ᐟ³. Correct answer: D.