Required information A piano \"string\" is steel wire with radius 0.500 mm and length 1.40 m. It is under 768 N oftension. The density of steel is 7860 kg/m3 (see table 9.1). The Young's modulus of steel is 2.00 x 1011 Pa (see table 10.1). Consider the wire to be a thin solid steel rod What is the speed of longitudinal waves (i.e., sound) in the wire? (Longitudinal waves in the wire do contribute to the characteristic sound of the piano.) :km/s