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A certain spacecraft is x AU (Astronomical Units) from Earth. How long in seconds does it take for a signal to reach the Earth after it is transmitted from the spacecraft? Hint: An AU is about 149.9 Million Km, and light moves at 299,800 Km/s. Indicate your answer to the nearest whole second.

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princessesther2011

Answer:

The time taken for a signal to reach the Earth after it is transmitted from the spacecraft is (500x) seconds

Explanation:

Distance of spacecraft from Earth = x AU = x × 149.9×10^6 Km = (149.9×10^6x) Km

Speed of light = 299,800Km/s

Time taken for a signal to reach the Earth after it is transmitted from the spacecraft = distance of spacecraft from Earth ÷ speed of light = (149.9×10^6x)Km ÷ 299,800Km/s = (500x) seconds

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