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When U^238 nucleus originally at rest, decays by emitting an alpha particle having a speed u,

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

(a) 4u/238

(b) -(4u/234)

(c) 4u/234

(d)  -(4u/238).

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1 Answer

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Best answer

Correct Option (c) 4u/234

Explanation:

Apply conservation of linear momentum

The residual nucleus will recoil with a velocity of 4u/234 units

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