Problem 17.15 + Harmonics of a Piano Wire https://session.masteringphysics.com/myct/assignmentPrint View ?assignmentID=9823567 3/6 A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.600 m and a mass of 4.50 g. 2/23/22, 7:29 AM Homework 7 Part A A violin string is 30 cm long. It sounds the musical note A (440 Hz) when played without fingering. What is the frequency f1 of the string's fundamental mode of vibration? Part A Express your answer numerically in hertz using three significant figures. You did not open hints for this part. How far from the end of the string should you place your finger (or how much shorter should the string be) to play the note C (523 Hz)? ANSWER: Express your answer with the appropriate units. f1 = Hz ANSWER: L= Part B What is the number n of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to f = 16 kHz? A Pipe Filled with Helium Express your answer exactly. You did not open hints for this part. ANSWER: n = A certain organ pipe, open at both ends, produces a fundamental frequency of 253 Hz in air. Part A If the pipe is filled with helium at the same temperature, what fundamental frequency fHe will it produce? Take the molar mass of air to be 28.8 g/mol and the molar mass of helium to be 4.00 g/mol . Express your answer in hertz. You did not open hints for this part. ANSWER: fHe = Hz