■解答
① \(\displaystyle\frac{4\pi}{3}\rho r^3\) ② \(M\left(\displaystyle\frac{r}{R}\right)^3\) ③ \(\displaystyle\frac{GMm}{R^3}r\)
④ \(2\pi\sqrt{\displaystyle\frac{R^3}{GM}}\) ⑤ \(\sqrt{\displaystyle\frac{2GMh}{R(R+h)}}\) ⑥ \(\sqrt{\displaystyle\frac{GM(R+3h)}{R(R+h)}}\)
⑦ \(\displaystyle\frac{|\mu -m|}{\mu +m}\) ⑧ \(\displaystyle\frac{2\mu}{\mu +m}\) ⑨ \(\displaystyle\frac{GMm}{R^3}x\)
⑩ \(\pi\sqrt{\displaystyle\frac{R^3}{GM}}\) ⑪ \(m\)
