A) 16/81
B) 8/9
C) 8/27
D) 2/3
Correct Answer: B
Solution :
Fractional decrease in kinetic energy of neutron =\[1-{{\left( \frac{{{m}_{1}}-{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}} \right)}^{2}}\] [As \[{{m}_{1}}=1\]and\[{{m}_{2}}=\text{ }2\]] \[=1-{{\left( \frac{1-2}{1+2} \right)}^{2}}\]\[=1-{{\left( \frac{1}{3} \right)}^{2}}=1-\frac{1}{9}=\frac{8}{9}\]
You need to login to perform this action.
You will be redirected in
3 sec
