Chapter 14, Problem 80PCE

Predict/Calculate Two strings that are fixed at each end are identical, except that one is 0.560 cm longer than the other. Waves on these strings propagate with a speed of 34.2 m/s, and the fundamental frequency of the shorter string is 212 Hz. (a) What beat frequency is produced if each string is vibrating with its fundamental frequency? (b) Does the beat frequency in part (a) increase or decrease if the longer string is increased in length? (c) Repeat part (a), assuming that the longer string is 0.761 cm longer than the shorter string.