Question

Radio waves travel at the speed of light. How long would it take the Russians

to send a message to a spacecraft orbiting Mars at a distance of 7.8 1010 m

from Earth?​

Answer 1

Answer:

All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.

Explanation:

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