Two planets move around the sun. The periodic times and the mean radii of the orbits are ${T_1},\,{T_2}$ and ${r_1},\,{r_2}$ respectively. The ratio ${T_1}/{T_2}$ is equal to
Two planets move around the sun. The periodic times and the mean radii of the orbits are ${T_1},\,{T_2}$ and ${r_1},\,{r_2}$ respectively. The ratio ${T_1}/{T_2}$ is equal to
${({r_1}/{r_2})^{1/2}}$
${r_1}/{r_2}$
${({r_1}/{r_2})^2}$
${({r_1}/{r_2})^{3/2}}$
Two planets move around the sun. The periodic times and the mean radii of the orbits are ${T_1},\,{T_2}$ and ${r_1},\,{r_2}$ respectively. The ratio ${T_1}/{T_2}$ is equal to
${T^2} \propto {r^3}\, \Rightarrow \,\frac{{{T_1}}}{{{T_2}}} = {\left( {\frac{{{r_1}}}{{{r_2}}}} \right)^{3/2}}$
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