Question 1
Find the average density of a red giant star with a mass of 20 × 1030 kg (approximately 10 solar masses) and a radius of 150 × 109 m (equal to the Earth's distance from the sun).
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1.41 × 10−4 kg/m3
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0.007 kg/m3
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1.41 kg/m3
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710 kg/m3
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1.41 × 10−3 kg/m3
Question 2
Find the average density of a white dwarf star if it has a mass equal to that of the sun (2.0 × 1030 kg) and a radius equal to that of the Earth (6.4 × 106 m).
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9.0 × 106 kg/m3
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1.8 × 107 kg/m3
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1.8 × 109 kg/m3
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3.6 × 1010 kg/m3
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9.0 × 107 kg/m3