1. The problem statement, all variables and given/known data You are playing a note that has a fundamental frequency of 428 Hz on a guitar string of length 56 cm. At the same time, your friend plays a fundamental note on an open organ pipe, and 6 beats per seconds are heard. The mass per unit length of the string is 2 g/m. Assume the velocity of sound is 343 m/s. (a) What are the possible frequencies of the open organ pipe? (Enter your answers from smallest to largest.) (b)What is the length of the organ pipe? 3. The attempt at a solution What does 6 beats per seconds mean? does it mean that there are 6 nodes?