The International space station (ISS) orbits the Earth at an altitude of 350km above the surface. it takes 90min to complete one orbit around the Earth. The computer clock on the ISS and the computer clock at the Kennedy Space Center (KSC) are designed to stay synchronized. However, as time passes the clock on the ISS starts falling behind the clock at the KSC, and it is determined that it is not caused by a mechanical failure. Hint; careful with units
A) explain why the two clocks fall out of synchronization
B) how much time must pass at the KSC before the clock on the ISS is one-second behind.