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Q6: Light from the photosphere of the Sun
Q18: Stars are made mostly of:<br>A) helium.<br>B) oxygen.<br>C)
Q19: Humans cannot survive on the surface of
Q25: On a typical H-R diagram,where are the
Q30: How do we know that Earth's magnetic
Q33: Which of the following does NOT contribute
Q44: Mekon Ltd.operates a paper mill that employs
Q45: The increasing temperature of the core of
Q45: Which point on the figure below represents
Q45: Balance of energy in the solar interior