本题目来源于试卷: new new new new，类别为 IB物理学
[问答题]
Show that if a satellite orbits very n d.1+3e8j l)5e3z:u pdz rb1tjnzapvye uwdseh l3qsh+i:r k.6nbao. +.ka49har the surface of a planet with period T , the density (mass/volume) of the pld.w.h rsun9 .3aak qe+h: +ohk4lisb 6anet is $\rho=m / V=3 \pi / G T^{2}$ .
(b) Estimate the density of the Earth, given that a satellite near the surface orbits with a period of about 85 min .
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