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A heavy nucleus at rest breaks into two fragments which fly off with velocities

A heavy nucleus at rest breaks into two fragments which fly off with velocities in the ratio 8:1. The ratio of radii of the fragments is

Options

(a) (1:2)
(b) (1:4)
(c) (4:1)
(d) (2:1)

Correct Answer:

(1:2)

Explanation:

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