the time required for a sound pulse to travel the length of the bar. The Young‘s modulus of copper is 1.1 × 1011 N/m2; and its density is 8890 kg/m3. The student finds that the time for the pulse to travel from one end to the other is 5.6 × 10–4 s. How long is the rod?
The speed of the pulse is: v √[Y / ρ] The length of the rod is the distance the pulse travels, or: l vt t√[Y / ρ] 5.60 x 10^-4s√[1.10 x 10??N/m? / 8,890kg/m?] 1.97m Hope this helps.
