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A nucleus ""(z)X^4 emits an alpha -parti...

A nucleus `""_(z)X^4` emits an `alpha` -particle with velocity v. The recoil speed of the daughter nucleus is :

A

`(A-4)/(4v)`

B

`(Av)/(A-4)`

C

v

D

`v/4`

Text Solution

Verified by Experts

The correct Answer is:
B
Let the recoil speed of daughter nuleus is v..
0=(A-4v.+4v)
or (A-4)=-4v
or `v.=-(4v)/((-A-4))`
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