1. The problem statement, all variables and given/known data -a pipe closed at one end resonates with a turning fork at a length of 25cm. The next resonant length is 75cm. The air temperature is 11.6C. What is the wavelength of the sound produced by the turning fork. 2. Relevant equations 1st harmonic: lambda = 4 * L 3rd harmonic: lambda = 4/3 * L 3. The attempt at a solution ok so the 3rd resonant legth = .75m so .75m = 4/3 *L L = .56m so for the 1st resonant lenght -> lambda = 4 * .56m =2.25m since the frequency of the turning fork must equal the frequency of the pipe and the speed of sound stays the same that means the pipe and turning fork will have the same wavelength. so the wavelength of the sound produced by the turning fork is 2.25m. is that correct...? thanks for the help, in advance!