Europa, a satellite of Jupiter, has an orbital diameter of 1.34 109 m and a period of 3.55 days. What is the mass of Jupiter? (G = 6.67 10-11 N m2/kg2 )
A) 1.53 1027 kg
B) 1.65 1027 kg
C) 1.07 1027 kg
D) 1.89 1027 kg
E) 3.08 1027 kg
Question 2
How fast would a rocket ship have to move past Earth to contract to half of its proper length as observed by an Earth-based physicist?
What will be an ideal response?