The source of the Sun's energy is ________.
A) chemical burning
B) nuclear fission
C) nuclear fusion
D) heat of contraction
E) potential energy
Correct Answer:
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Q19: The problems encountered with lenses caused this
Q20: X-rays have shorter wavelength than visible light;
Q21: The first telescopes,and most amateur telescopes,rely on
Q22: Which of the following is not an
Q23: The layer of the solar atmosphere directly
Q25: The outermost layer of the Sun is
Q26: The layer of the Sun that radiates
Q27: Why would astronomers place an X-ray observatory
Q28: Classic Newtonian reflector telescopes use a mirror
Q29: Which of the following is not a
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