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?
The Attempt at a Solution
I'm new to Physics and I'm just taking it this year, so all I could figure is converting 20,000 km to 20,000,000 meters. That's all I know to do, though.