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Why Is a 1 Solar- Mass Red Giant More Luminous

Question 93

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Why is a 1 solar- mass red giant more luminous than a 1 solar- mass main sequence star?


A) Fusion reactions are producing energy at a greater rate in the red giant.
B) The red giant is more massive.
C) The red giant has a hotter core.
D) The red giant's surface is hotter.

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