A newly discovered exoplanet P is observed with a mean radius of 7.0×106m. Astronomers estimate that the acceleration due to gravity on its surface is 12m/s2.
Using these data:
(a) Find the mass of planet P.
(b) Calculate the average density of the planet, assuming it is a uniform sphere.
(c) Compare the density obtained in part (b) with Earth’s mean density 5.52×103kg/m3 and state whether planet P is more or less dense than Earth, giving the ratio of the two densities.