[填空题]
In the later stages of stellar evoljf*wy ztjs;*3j / ufh9ution, a starh--mbxxcwa n4(pnfw ;.37 ryf (if massive enough) will begin fusing carbon nuclei to ;7bx-hx -ry3w( . 4fw fpnnacmform, for example, magnesium:
$^12\text{C} + ^12\text{C} \to ^{24}\text{Mg} + \gamma$.
(a) How much energy is released in this reaction (see Appendix B). Q = MeV
(b) How much kinetic energy must each carbon nucleus have (assume equal) in a head-on collision if they are just to touch (use Eq. 30-1) so that the strong force can come into play? $\text{KE}_{\text{nucleus}}$ = MeV
(c) What temperature does this kinetic energy correspond to? T$= $ $ \times 10^{10}\ \text{K}$
