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As a main sequence star exhausts hydrogen in its core, its surface becomes ___ and its energy output per second (luminosity) becomes ____.
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As a main sequence star exhausts hydrogen in its core, its surface becomes ___ and its energy output per second (luminosity) becomes ____.

User Vishal Thakkar
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1 Answer

4 votes

Answer:

b

Step-by-step explanation:

bc

User Fordeka
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