When a piano tuner stretches a 1.2 m long steel piano wire with a tension of 800 N, the velocity of a wave propagated along the string is 240 m/s. A) Calculate the mass per unit length, µ, of the wire. B) What would be the frequency of the second harmonic of this string? C) How many times will Mr. Opporknockity tune this piano?

When a piano tuner stretches a 1.2 m long steel piano wire with a tension of 800 N, the velocity of a wave propagated along the string is 240 m/s. A) Calculate the mass per unit length, µ, of the wire. B) What would be the frequency of the second harmonic of this string? C) How many times will Mr. Opporknockity tune this piano?