Physics Help: Sound-A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds?
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A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.400 s. (a) How far away is the explosion if air temperature is ...show more
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Answer:
For answering first part one should know velocity of sound at 25C. Either take from table or use SQRT kRT to get vs. then distance is 0.4 vs. If velocity of light is taken as 3 *10^8 m/sec. =vl then X/vs-X/vl=o.4 hence x=0.4/(1/vs-1/vl)
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