A planet revolves with a speed of 2,97 * 10^{4}m s^{-1} in orbit around a star. The radius of the orbit is equal to 1,96 * 10^{11}m.

a. What would be the speed in km h^{-1}

b.^{ }Calculate how many days it would take for the planet to complete a full orbit around the star.

c. The mass of the planet is 5,972 * 10^{24}. The average density is 5,513 * 10^{3} kg m^{-3}. Give the order of magnitude of the mass of the planet.

The question kind of is more physics related but I hope you don't mind.

Guest Nov 27, 2019