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In our universe, electric and gravitational force decrease with $r^{-2}$ because of the inverse-square law. Imagine a spherical shell around some point source. The area of a shell at some radius $...
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#1: Attribution notice removed
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System
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2020-06-01T14:13:47Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/29587 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/