Official 29 Lec 4
Question 4 of 6
According to the professor, what is the significance of having a satellite in orbit about 36,000 kilometers above Earth’s surface?

A.

This is the physical limit of the length that a carbon nanotube cable could reach

B.

A satellite orbiting at this height can remain directly above one location on Earth

C.

Earth’s gravitational field is too weak to hold a satellite in orbit at higher altitudes

D.

The distance around Earth’s equator is approximately 36,000 kilometers

正确答案:B

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