What are the times at phantom fireworks?

PHYSICS HELP PLEASE A physicist at a fireworks display times the lag between seeing an explosion and hearing i?

A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.600 s. (a) How far away is the explosion if air temperature is ...show more
Answer:

a) 342 * 0.600 = 205.2m b) 205.2 / 299792458 = 6.8447x10 ^ -7 m or 0.68447 micrometers

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