A long slender bar is made from an unknown material. The length of the bar is 0.807 m, its cross-sectional area is 1.62 x 10^-4 m^2, and its mass is 1.91 kg. A sound wave travels from one end of the bar to the other end in 1.84 x 10^-4 s. Find the Young's modulus of the unknown material.
