A deep-space satellite is sent to orbit a distant planet with unknown mass. On arrival, the satellite begins its orbit and measures a gravitational pull from the
planet of 620 N. If the satellite has a mass of 450 kg and orbits the planet at a
radius of 4.0 x 106 m, what is the approximate mass of the planet? (Recall
that G = 6.67 x 10-11 N·m2/kg)
A. 7.8 x 10^23 kg
B. 2.9 x 10^22 kg
C. 4.5 x 10^24 kg
D. 3.3 x 10^23 kg

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.