An artificial Earth satellite moves in a circular orbit at an altitude of 6400 km above the surface.

An artificial Earth satellite moves in a circular orbit at an altitude of 6400 km above the surface. You are in Petersburg and you see a satellite directly overhead. What is the maximum distance from you (on the surface of the Earth) can your friend be so that he can see this satellite simultaneously with you

An artificial Earth satellite moves in a circular orbit at an altitude of 6400 km above the surface. You are in Petersburg and you see a satellite directly overhead. What is the maximum distance from you (on the surface of the Earth) can your friend be so that he can see this satellite simultaneously with you

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