How many nuclear reactions occur in a proton-proton chain?
A) one
B) two
C) three
D) four
E) five
Correct Answer:
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Q19: What is the average distance between the
Q20: When the Sun generates its own energy,
Q21: Astronomers often record solar images in the
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Q28: What causes granulation on the photosphere?
A) convection
B)
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