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One model for a certain planet has a core of radius R and mass M surrounded by an outer shell of inner radius R, outer radius 2R, and mass 4M. If M-7.53 × 1024 kg and R = 7.08 x 106 m, what is the gravitational acceleration of a particle at points (a) R and (b) 3R from the center of the planet? (a) Number Unii (b) Number Units

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Sa Mえ 7.53x 1024 kg A) Acceleratio due to Carav 53x1011 10,0)/s OR)- 9 (7.08 치05)

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