Asked by Thousif

A U-238 nucleus originally at rest , decays by emitting an alpha- particle , say with a velocity of vm/s. The recoil (in m/s) of the residual nucleus is.?
Ans: 4v/238
Answered by bobpursley
work this out with conservation of momentum, the atomic mass of the alpha is 4amu
Answered by Scott
the mass of the recoiling nucleus is
... 238 - 4

r * 234 = v * 4
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