(11) A 2.06m long air column is open at both ends. The frequency of a certain harmonic is 1080Hz, and the frequency of the next higher harmonic is 1620Hz. Determine the speed of sound in the air column. mes one 0 a (12a) What is the longest wavelength for standing waves on a 317.0 cm long string that is fixed at both ends? :] Tries 0/10 (12b) What is the second longest wavelength for standing waves? :] Tries 0/10 (12c) What is the third longest wavelength for standing waves? E Tries 0/10 (12d) If the frequency of the second-longest wavelength is 54.6 HZ, what is the frequency of the third longest wavelength? S Submit Answer Tries 0/ 10