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You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?
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What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight
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A star has a mass of 2.85 X 1030 kg with a planet orbiting at an average distance of 3.56 X 108 km....
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