Posted by weng on Thursday, July 8, 2010 at 3:29am.
y = C/r^2
is a simplified form of an inverse square law.
y might be the gravitational force or weight of an object, and r the radial distance from the center of some planet. C is a constant.
The same equation applies to electric field around a point charge, or the intensity of sound or light from a point source.
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