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===Mass and Radius=== |
===Mass and Radius=== |
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− | Objects in Universe Sandbox are simulated as spheres of uniform density, so the density of an object, ρ, is related to its [[radius]], ''R'', and [[mass]], M, by |
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− | :<math>M = \frac{4}{3}\pi R^3 \rho.</math> |
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− | [[Category:Physics]] |