Consider the fission of ${ }_{92}^{238} \mathrm{U}$ by fast neutrons. In one fission event, no neutrons are emitted and the final end products, after the beta decay of the primary fragments, are ${ }_{58}^{140} \mathrm{Ce}$ and ${ }_{44}^{99} \mathrm{R}$ u. Calculate $\mathrm{Q}$ for this fission process. The relevant atomic and particlemasses are $\mathrm{m}\left(\begin{array}{c}238 \\ 92\end{array}\right)=238.05079 \mathrm{u}$
$\mathrm{m}\left({ }_{58}^{140} \mathrm{Ce}\right)=139.90543 \mathrm{u}$
$\mathrm{m}\left({ }_{-44}^{99} \mathrm{Ru}\right)=98.90594 \mathrm{u}$