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How long does it take a message to travel from Earth to a spacecraft on Mars at its farthest from Earth about 400 million rm km?
Wiki User
∙ 13y ago
We'll take your word for it and use the distance of 400 million km.
The speed of radio (and light, heat, UV, X-ray, etc.) is 300,000 km/sec.
Time = (400 x 106) / (300 x 103) = 1,333 seconds = 22.2 minutes
Wiki User
∙ 13y ago
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