Energy reaches Earth from the Sun at a rate of about 1300 W/m2. Calculate
(a) The total power output of the Sun,
(b) The number of protons consumed per second in the reaction of Eq. 31-7, assuming that this is the source of all the Sun's energy.
(c) Assuming that the Sun's mass of 2.0 × 1030 kg was originally all protons and that all could be involved in nuclear reactions in the Sun's core, how long would you expect the Sun to "glow" at its present rate? See Problem 62.