The motion of planets in the solar system is an example of the conservation of:

If $A$ is the areal velocity of a planet of mass $M$,its angular momentum is

The average distance of the Earth from the Sun is $L_{1}$. If one year of the Earth is $D$ days, then one year of another planet whose average distance from the Sun is $L_{2}$ will be:

If the orbital period of a satellite becomes $8$ times, then by how many times does its orbital radius increase (in $\times$)?

According to Kepler's law,the time period of a satellite varies with its radius as:

$A$ geostationary satellite is taken from one orbit to another orbit,whose distance from the centre of the Earth is $2$ times that of the earlier orbit. The time period in the second orbit is how many hours?