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04-01-2017
Chemistry

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The speed of light is used to determine the length of a light-year. About how far does light travel in one second? A. 30 km B. 3,000 km C. 30,000 km D. 300,000 km

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kvonderhaar kvonderhaar

04-01-2017

The answer would be D. 300,000 km/s

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