2. 0/1 points | Previous Answers MI4 4.13.063 My Notes You hang a heavy ball wit

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2. 0/1 points | Previous Answers MI4 4.13.063 My Notes You hang a heavy ball with a mass of 35 kg from a copper rod 2.9 m long by 2.0 mm by 3.0 mm. You measure the stretch of the rod, and find that the rod stretched 0.00137 m. Using these experimental data, what value of Young's modulus do you get? N/m2 Enter a number The atomic mass or copper is 64 g/mole, and the density of copper is 8.9 g/cm3. Using this information along with the measured value of Young's modulus, calculate the speed of sound in copper. x m/s Additional Materials Section 413 Submit Answer Save Progress

Explanation / Answer

You hang a heavy ball with a mass of 35 kg from a copper 2.9m long by 2.0 mm by 3.0 mm. You measure the stretch of the rod, and find that the rod stretched 0.001370 m

  Young's Modulus = (F/A)/(L/L0) = (35*9.8/(0.0020*0.0030)/(0.001370/2.9) =121009732360 N/m^2

v = sqrt(Y/)

= sqrt(121009732360 / (64000*8900) = 212.4468m/s

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