Supposing Newton's law of gravitation for gravitation forces $F_1$and $F_2$between two masses $m_1$and $m_2$at positions $r_1$and $r_2$read

$F_1=-F_2=\frac{r_{12}}{r_{12}^3}G{M}_0^2{\left(\frac{m_1{m}_2}{M_0^2}\right)}^n$

where $M_0$is a constant of the dimension of mass, $r_{12}=r_1-r_2$and $n$is a number? In such a case 

Which of the following are true?

Two identical satellites are at $R$ and $7R$ away from the earth surface, the wrong statement is ($R=$Radius of earth)

Two artificial satellites of same mass are moving around the Earth in circular orbits of different radii. In comparison to the satellite with lesser orbital radius, the other satellite with higher orbital radius will have

A hollow sphere (mass $\mathrm{m}$, radius $\mathrm{R}$ ) is put inside a hollow cone (mass $\mathrm{m}$, radius $3\mathrm{R}$ and semi-angle $30°$ ) as shown in the figure. The whole arrangement is rigidly fixed to the ground at the apex of the cone. Both the sphere and the cone are made of the same material $\left(\alpha ={10}^{-4}/{}^{\circ }\mathrm{C}\right)$. Considering that major changes in dimensions could happen only due to heating effects, if the increase in potential energy (in Joule) of the system if it's temperature is increased by $100°\mathrm{C}$ is $∆U$, what is the value of $10∆U$?

$\mathrm{m}=0.5 \mathrm{kg}$  

$\mathrm{R}=\frac{\sqrt{3}-1}{2} \mathrm{m}$