Communications Satellites Are Usually Placed in Geosynchronous Orbits,a Distance of 4.43

question 48

Multiple Choice

Communications satellites are usually placed in geosynchronous orbits,a distance of 4.43 $\times$ 10⁷ m from the center of Earth.What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth R_E = 6.370 $\times$ 10⁶ m.)

• A)0.13 s
• B)0.25 s
• C)0.51 s
• D)0.29 s
• E)0.15 s

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