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A piece of space junk has a mass of 3 kg and is orbiting the Earth every 90 min at an altitude of 300 km. The Earth’s radius is 6.38 × 106 m. What is the junk’s orbital velocity?

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A piece of space junk has a mass of 3 kg and is orbiting the Earth every 90 min at an altitude of 300 km. The Earth’s radius is 6.38 × 106 m. What is the junk’s orbital velocity?






 
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