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What is the relationship between the mass of a protostar and the time needed for it to reach the ...

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What is the relationship between the mass of a protostar and the time needed for it to reach the ...

What is the relationship between the mass of a protostar and the time needed for it to reach the main sequence after it forms inside an interstellar cloud?
A)   More massive protostars reach the main sequence in a shorter time than less massive protostars.
B)   Less massive protostars reach the main sequence in a shorter time than more massive protostars.
C)   The time needed is independent of the mass of the protostar.
D)   The time needed is least for a protostar of approximately 4 solar masses and longer for protostars of either greater or lesser mass.

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Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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