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which a U^(238) nucleus original at rest...

which a `U^(238)` nucleus original at rest , decay 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)`

Text Solution

Verified by Experts

The correct Answer is:
C
`U^(238) rarr U^(234)+._(2)He^(4)`
Let recoil speed be V then by COLM
`234 V=4uimplies V=(4u)/234`
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