Nuclei - Result Question 13

13. A nucleus ruptures into two nuclear parts, which have their velocity ratio equal to 2:1. What will be the ratio of their nuclear size (nuclear radius)?

(a) 21/3:1

(b) 1:21/3

(c) 31/2:1

(d) 1:31/2

[1996]

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Answer:

Correct Answer: 13. (b)

Solution:

  1. (b) Applying law of conservation of momentum,

m1v1=m2v2

v1v2=m2m1

As m=43πr3ρmr3

Hence, m2m1=r23r13

v1v2=r23r13r2r1=(12)13



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