text: how to calculate? 2 similar but unrelated problems:  1) if saturn has a mass 95.2 times that of earth, and a radius 9.47 times that of earth, what is the escape speed for objects on the surface of saturn (in km/s)?  2) what is the escape speed for a rocket leaving the moon if the acceleration of gravity on the moon is 0.166 times that on earth and the moon's radius is 0.273 re (in km/s)? escape speed for saturn is 35.49 km/sec and for the moon it is 2.38 km/sec