As space exploration increases, means of communication with humans and probes on other
Chapter 7, Problem 7.74(choose chapter or problem)
As space exploration increases, means of communication with humans and probes on other planets are being developed. (a) How much time (in s) does it take for a radio wave of frequency 8.93_107 s_1 to reach Mars, which is 8.1_107 km from Earth? (b) If it takes this radiation 1.2 s to reach the Moon, how far (in m) is the Moon from Earth?
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