Question

When a U²³⁸ nucleus, originally at rest, decays by emitting
an a-particle, say with speed of v m/sec, the recoil speed of
the residual nucleus is (in m/sec.)
(a) – 4 v/234 (b) – 4 v/238
(c) 4 v/238 (d) – v/4

Answer 1

Answer:

a...

Explanation:

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Answer 2

Answer:

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