Topic: magnetic resonance therapy machine

10,000 km, and its rate compared with an an identical clock on the bottom. Though the global Positioning System (GPS) just isn't designed as a test of elementary physics, it should account for the gravitational redshift in its timing system, and physicists have analyzed timing data from the GPS to confirm different assessments. When the first satellite was launched, some engineers resisted the prediction that a noticeable gravitational time dilation would occur, so the first satellite was launch...