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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
The source of a protostar's heat is
A)   gravitational energy released as the protostar expands.
B)   nuclear reactions converting helium to carbon and oxygen in its core.
C)   gravitational energy released as the star contracts.
D)   nuclear reactions converting hydrogen into helium in its core.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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staedtler Author
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7 years ago
I really appreciate your help!
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