Suppose there existed a planet that went around the sun twice as fast as the earth. What would b...

Suppose there existed a planet that went around the sun twiche as fact as the earth. What would by its orbital size?

Who explain the motion of planets around the sun?

The escape velocity form the earth is 11 kms^(-1) the esacpe velocity from a planet having twice the radius and the same mean denisty as the earth would be