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Environmental Science is the most important of all sciences. As the world enters a phase of climate change, unprecedented biodiversity loss, pollution and human population growth, the management of our environment is vital for our futures. Learn about Environmental Science on

Environmental Science

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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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