How long can a four-solar-mass star live
A) 1 solar lifetime
B) 0.03125 solar lifetimes
C) 3 solar lifetimes
D) None of the other choices are correct.
Correct Answer:
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Q74: Q75: The pressure of an interstellar gas cloud Q76: The interstellar medium is made of _. Q77: A spectral line produced in the atmosphere Q78: To initiate star formation in a cloud, Q80: A star has crossed the birth line Q81: In the collapse of a protostar _ Q82: The Sun has a core in which Q83: Ninety percent of all stars fuse helium Q84: The Sun makes most of its energy
A)gas
B)dust
C)gas
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