the sun emits energy continuously into the universe. the fraction of this energy flux intercepted by the earth is 1.75 x 1011 MW. the earth-sun distance is about 1.5 x 10 8 km, and the earth’s radius is about 6370 km. the radius of the sun is about 696,000 km and its density is about 1.4 kg/m3 . (a) What is the overall rate at which energy is emitted from the sun in all directions? (b) At what rate (in metric tons per second) is the sun losing mass? (c) In how many years will the sun lose 1/10,000 of its mass due to its continuous energy emission?
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