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Question: Planet Y has a mass twice that of Planet X, and Planet Y has a radius twice that of Planet X. What is the ratio of the gravitational field strength on the surface of Y to that on X?




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Into the face of the young man who sat on the terrace of the Hotel Magnifique at Cannes there had crept a look of furtive shame, the shifty hangdog look which announces that an Englishman is about to speak French.

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