An astronaut circling the earth at an altitude of 400km is horrified to discover that a cloud of space debris is moving in the exact same orbit as his spacecraft, but in opposite direction. The astronaut detects the debris when it is 25km away. How much time does he have to fire his rockets and change orbits?

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Chapter 13, Problem 45EAP

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An astronaut circling the earth at an altitude of 400km is horrified to discover that a cloud of space debris is moving in the exact same orbit as his spacecraft, but in opposite direction. The astronaut detects the debris when it is 25km away. How much time does he have to fire his rockets and change orbits?

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