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A uranium 238 nucleus, initially at rest...

A uranium 238 nucleus, initially at rest emits an alpha particle with a speed of `1.4xx10^7m/s`. Calculate the recoil speed of the residual nucleus thorium 234. Assume that the mas of a nucleus is proportional to the mass number.

Text Solution

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The correct Answer is:
A, B, D
`p_i=p_f`
`:. 0=(4)(1.4xx10^7)+(234)v`
`:. v=-24xx10^5m//s`
Here, negative sign implies that this velocity is opposite to the direction of velocity of alpha particle.
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