Consider a satellite going round the Earth in an orbit. Which of the following statements is wrong?

$A$ satellite of mass $m$ is revolving close to the surface of a planet of density $d$ with time period $T$. The value of the universal gravitational constant $G$ in terms of $d$ and $T$ is given by:

$A$ satellite is revolving around a planet in a circular orbit close to its surface. Let $\rho$ be the mean density and $R$ be the radius of the planet. Then the period of the satellite is ($G=$ universal constant of gravitation).

An astronaut orbiting the Earth in a circular orbit $120 \ km$ above the surface of the Earth,gently drops a spoon out of the spaceship. The spoon will

Write the equation for the orbital velocity of a satellite revolving very close to the surface of the Earth.

$A$ double star is a system of two stars rotating about their centre of mass only under their mutual gravitational attraction. Let the stars have masses $m$ and $2m$ and their separation be $l$. Their time period of rotation about their centre of mass will be proportional to: