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

question 45

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

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