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5 July, 21:04

How long does it take a message to travel from earth to a spacecraft at mars at its farthest from earth (about 400 million km) ? express your answer to three significant figures and include the appropriate units. t = ?

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  1. 5 July, 23:52
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    A message needs to be traveled to mars from earth. Distance between Earth and Mars (given) s = 400 million km

    Speed of light = 3.00-10^5 km / sec

    We know Velocity = distance / time = > time = distance / velocity

    Time taken t = 400 million km / 3.00-10^5 = 400 x 10^6 / 3 x 10^5 = 1333.3 sec Time taken t = 22 min
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