If There Were Mixing Processes in a Main-Sequence Star with a Radiative

question 62

Multiple Choice

If there were mixing processes in a main-sequence star with a radiative zone (there aren't) that churned up all the material in the interior, we would expect that the main-sequence lifetime would be ________ because ________.

• A) shorter; the star would turn into a giant faster
• B) shorter; the star would burn hydrogen faster and have a higher luminosity
• C) longer; helium nuclei have a higher mass than hydrogen nuclei
• D) shorter; the star would never turn into a red giant
• E) longer; more hydrogen would be available to burn

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