What fuel do stars on the main sequence burn?
A) hydrogen
B) helium
C) carbon
D) iron
E) uranium
Correct Answer:
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Q30: Hydrostatic equilibrium is the balance between _
Q31: The CNO cycle produces energy by fusing
A)
Q32: During a star's main sequence portion of
Q33: A star whose mass is 5 times
Q34: When a star has stopped contracting and
Q36: Why do elements fuse only in a
Q37: What makes a star shine?
A) reflected light
Q38: What determines how long a star stays
Q39: What determines how rapidly a star burns
Q40: What of the following most directly determines
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