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MCQIntermediateStars & Stellar Evolution

USAAAO — 2018 First Round

Question 13

Star A has a surface temperature of 10,000 K while Star B has a surface temperature of 4,000 K. Star B is 10 times larger than Star A and its distance from Earth is half that of Star A. What is the magnitude difference between Stars A and B?

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Source

Source: USAAAO 2018 First Round, Question 13.