At its closest approach, the distance between Mars and Earth is 60 million km. How long would it take to send a radio message from a space probe on Mars to Earth?

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Question

Prashant Kotian · Accepted Answer

Correct answer: B. d = 6*10^10 m; t = d/c = 6*10^10 / (3*10^8) = 200 s.

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