Question

1.
A uranium-238 nucleus, initially at rest, emits an
al He) particle with energy E. The recoil speed of
residual nucleus thorium-234 is (Masses are same
as their mass number)
​

Answer 1

Answer:

$\frac{ \sqrt{2e} }{117 }$

Explanation:

$\frac{1}{2} mv ^{2} = e \\ where \: m = 4 \\ \frac{1}{2} \times 4 \times v 1^{2} = e \\ v1 = \sqrt{ \frac{2e}{4} } \\ m1v1 = m2v2 \\ 4 \times v1 = 234 \times v2 \\ v2 = \frac{ \sqrt{2e} }{117}$