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?

Question

Physics

Pete

18 April, 13:57

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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Kaelyn Orr · Answer 1

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