本题目来源于试卷: Nuclear Energy; Effects and Uses of Radiation，类别为 IB物理学
[问答题]
The energy output of massive starstje6ob9i : r(c is believed to be due to the ca;9pq4yfabh:j rbon cycle (see text). (a) Show that no carbon is consumed in this cycle and that the net effect is the same as for the proton-proton cycle. (b) What is the total energy release? (c) Determine the energy output for each reaction and decayf ah :yb;49jqp. (d) Why does the carbon cycle require a higher temperature ($T \approx 2 \times 10^7\ \text{K}$) than the proton-proton cycle ($T \approx 1.5 \times 10^7\ \text{K}$)?
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