2018-11-21 17:13:16 UTC
Tom Holmes wrote: "If the Earth were homogeneous then g would drop by 1/r^2 outside and 1/r inside the surface. "
This is incorrect. If the earth were homogeneous then g would indeed drop as 1/r^2 outside but would go as r inside. Thus it drops to 0 at the centre as well as at infinity.
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