question_answer

            A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2:1. The ratio of their nuclear sizes will be                                                      [AIEEE 2004]

A) \[{{2}^{1/3}}:1\]

B) \[1:{{3}^{1/2}}\]

C) \[{{3}^{1/2}}:1\]

D) \[1:{{2}^{1/3}}\]

Correct Answer: D

Solution :

[d] Law of conservation of momentum gives

But       or