# Chemistry

The space probe Pioneer 11 was launched April 5,1973, and reached Jupiter in December 1974 traveling a distance of 998 million km. How long did it take an electromagnectic signal to travel to earth from Pioneer 11 when it was near Jupiter.

Where do I begin???

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1. The speed of light is, for all practical purposes, 3 x 10^8 meters/second.
Distance = rate x time.

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