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Mathematics 9 Online
OpenStudy (jasonderubis):

Suppose Galileo and his assistant were 1 km apart when Galileo uncovered his lantern to try to measure the speed of light. How long would it have taken the light signal to reach his assistant? 3.3 × 10–6 s 1.0 s 3.0 × 108 s 3.3 × 10–9 s

OpenStudy (skullpatrol):

Distance = rate X time rate = 299,792,458 m/s

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