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SOLVED:Sputnik The first artificial satellite to orbit the Earth was Sputnik I, launched October 4,1957 The mass of Sputnik I was 83.5 kg , and its distances from the center of the Earth at apogee and perigee were 7330 km and 6610 km, respectively. Find the difference in gravitational potential energy for Sputnik I as it moved from apogeeto perigee.
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