What If Earth Doubled In Size?, Gravitational Force

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What if Earth Doubled in Size?

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The thought experiment: What if the Earth doubled in size? - BBC Science Focus Magazine

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What will be the effect of gravity when the radius of the Earth is doubled? - Quora

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newtonian mechanics - Why is the Force of Gravitational Attraction between two “Extended” bodies proportional to the product of their masses? - Physics Stack Exchange

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