A long slender bar is made from an unknown material. The length of the bar is 0.83 m, its cross-sectional area is 1.3 × 10-4 m2, and its mass is 2.1 kg. A sound wave travels from one end of the bar to the other end in 1.9 × 10-4 s. From which one of the materials listed in Table 10.1 is the bar most likely to be made?

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Table 10.1 Values for the Young's Modulus of Solid Materials Young's Modulus Y (N/m?) Material 6.9 X 1010 Aluminum Bone Compression 9.4 x 10 Tension 1.6 X 1010 Brass 9.0 x 100 Brick 1.4 X 100 Copper 1.1 x 10" Mohair 2.9 x 10 Nylon Pyrex glass 3.7 X 10° 6.2 x 1010 Steel 2.0 X 10" Teflon 3.7 x 10 Titanium 1.2 x 10" Tungsten 3.6 x 10"