Question

l 1.] (16 points) The proton-proton p-p) chain reaction is presently the source of (nuclear) energy in the core of stars. This reaction releases 6.0 x 10 14 J/kg. Consider a star with a total mass of 4.15 x 30 kg; the p-p chain will convert 10% of its mass (core mass) to helium. If the total power (luminosity) of the star is 8.2 x 1020 W, how many years can it produce energy by this reaction?

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