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In general relativity, gravity
changes time. Gravitational
potential = - G M / R. Time
change r = At/t = A/c². A
satellite (e.g., GPS) orbits 21 km
above Earth surface, and gravity
at the satellites are a little different
from Earth surface. The distance
error is Ad = c At. Ad is
km in one day
Please do not copy and paste.
Thank you!
Transcribed Image Text:In general relativity, gravity changes time. Gravitational potential = - G M / R. Time change r = At/t = A/c². A satellite (e.g., GPS) orbits 21 km above Earth surface, and gravity at the satellites are a little different from Earth surface. The distance error is Ad = c At. Ad is km in one day Please do not copy and paste. Thank you!
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