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A hammer strikes one end of a thick copper rail of length 8 12 m...

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A hammer strikes one end of a thick copper rail of length 8 12 m A microphone located at the opposite end of the rail detects two pulses of sound one that travels through the air and a longitudinal wave that travels through the rail The speed of sound in air is 343 m s b Find the separation in time between the arrivals of the two pulses

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