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What is the total power output of our Sun (i.e. the energy output per second)? (a)...

What is the total power output of our Sun (i.e. the energy output per second)? (a) Assume all of power is released from nuclear reactions, how much mass is the Sun currently losing every second? (b) how many years would it take for the sun to lose 1% of its total mass, if it keeps losing mass at the current rate?

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