Question

GPS can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of the several satellites orbiting Earth. If one of the satellites is at a distance of 20,000 km from you, what percent accuracy in the distance is required if we desire a 2-meter uncertainty? How many significant figures do we need to have in the distance?
Global Positioning System (GPS) satellites circle Earth at altitudes of approximately 20000 , where the gravitational acceleration has 5.8% of its surface value.
idk bro, anyone knows????? i need help w. this as well
its 12 hours.
T=2piR/v
a=v^2/R
9.81*5.8/100=0.56898
v=sqrt(0.56898*(20000+6400(Earth's radius))*10^3)=3875.702775
T=2*pi*26400000/3875.702775=42798.97137 s
/60=713 min
/60= 11.9 h

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