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29 December, 14:00

A hammer taps on the end of a 4.00-m-long metal bar at room temperature. a microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. the pulses are separated in time by 1 1.0 ms. what is the speed of sound in this metal?

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  1. 29 December, 16:53
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    Length that is distance s = 4.00m

    Speed of sound in air V = 343 m/s

    Time for metal = 11.0ms = 0.011

    Calculating the time t = s / V = 4 / 343 = 0.01166s

    Time for the sound in the metal = 0.01166 - 0.011 = 0.00066 = 6.6 x 10^-4s Speed of sound in metal Vm = 4 / 6.6 x 10^-4 = 6.060 x 10^3 m/s
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