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Data: MMoon = 7.346x1022 kg. MEarth = 5.9724x1024 kg. Earth-Moon distance = 238,862 mi. (center-to-center) Radius of Earth = 6,378 km. International Space Station (ISS) mass = MISS = 450,000 kg. ISS orbit is circular ISS completes one orbit in 92.94 min. G = 6.673x10-11 N-m2/kg2 1. How far from the Earth’s center is the center-of-gravity (c.g.) of the Earth-Moon system? 2. What percentage of the Earth’s radius is the distance from the Earth’s center to the c.g. of the Earth-Moon system? 3. What is the magnitude of the force exerted on the Earth by the Moon? 4. What is the magnitude of the acceleration of the Moon due to the force exerted on the Moon by the Earth? 5. What is the magnitude of the semi-major axis of the ISS orbit? 6. What is the altitude of the ISS orbit? (assume the Earth is a sphere). 7. What is the magnitude of the radial acceleration of the ISS? (hint: use a = 2r). 8. Use Newton’s universal law of gravitation to find the magnitude of the radial acceleration of the ISS.