How long does a radar signal take to travel from Earth to Mercury and back when Mercury is at its closest point to Earth?

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Anonymous

ANSWERS: 1

yeroco

Let's see. Radar travels at the speed of light, and Mercury and Earth are separated by 93,000,000-36,000,000 = 57,000,000 miles at the closest. Double that distance for a round trip and that's 114,000,000 miles. Divide that by 186,000 miles per second, and that will give you the time: 114,000,000 / 186,000 = ~613 seconds = 10 minutes, 13 seconds.

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