A piano tuner stretches a steel piano wire with a tension of 910 . The wire is 0.400 long and has a mass of 3.40.a) What is the frequency of its

A piano tuner stretches a steel piano wire with a tension of 910 . The wire is 0.400 long and has a mass of 3.40.a) What is the frequency of its fundamental mode of vibration? (in Hz) b)What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ?