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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

`-4upsilon// 234`

B

`upsilon//4`

C

`-4upsilon//238`

D

`4upsilon// 238`

Text Solution

Verified by Experts

The correct Answer is:
A
Conservation of momentum
`4v + 234v. = 238 xx0 " " [ :. U^(234) +""_(2)^(4)He rarrU^(238)]`
`implies v. = (-4v)/(234)`
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