Two satellites A and B, each of mass 50 kg are in circular orbits at altitudes of 1,000 km and 35,000 km respectively. What is the difference in the gravitational potential energies of the two satellites in their respective orbits? Given that mass of the earth, M=`6x 10^24 kg` radius of the earth, R=`6.4xx10^6` m and G=`6.67x10^-11 N m^2 kg^-2`