(Answered) A 793 kg satellite is in a circular orbit at an altitude of

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A 793 kg satellite is in a circular orbit at an altitude of 426 km above a planet's surface. This planet is similar to our Earth. Because of air friction, the satellite eventually is brought to the Earth's surface, and it hits the Earth with a speed of 0.864 km/s. The radius of the planet is 5 × 106 m and its mass is 6 × 1024 kg. The gravitational constant is 6.67259 × 10-11 N m2 /kg2 . How much energy was absorbed by the atmosphere through friction? Answer in units of J.

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