Asked by joe

A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the flash?
Answered by Damon
forget speed of light in this context, so much faster than sound that basically it is infinite. All that matters is the creeping speed of sound.

6.5 s * speed of sound in air = distance

then divide that distance by 3*10^8
Answered by Anonymous
7.431x10^10
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