A spacecraft in orbit around the moon measures its
Chapter 25, Problem 33MCQ(choose chapter or problem)
Problem 33MCQ
A spacecraft in orbit around the moon measures its altitude by reflecting a pulsed 10 MHz radio signal from the surface. If the spacecraft is 10 km high, what is the time between the emission of the pulse and the detection of the echo?
A. 33 ns
B. 67 ns
C. 33 μs
D. 67 μs
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