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When a U²³⁸ nucleus originally at rest, decays by emitting an alpha particle having a speed ' u ', the recoil speed of the residual nucleus is

Options

  1. A4 u 238
  2. B- 4 u 234
  3. C4 u 234
  4. D- 4 u 238

Correct answer

A. 4 u 238

Step-by-step solution

Applying the principle of conservation of linear momentum (4) ( u )=( v )(238) v = 4 u 238

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