a certain closed organ pipe has a length 0650m assuming the speed of s

Question

A certain closed organ pipe has a length 0.650m, assuming the speed of sound v is 335 ms: ) Calculate the wavelength and frequency of the fundamental mode of this pipe.[21 b) Calculate the wavelength and frequency of the third harmonic of this pipe. c) An open pipe of twice the length has the same fundamental frequency as this closed pipe.Explain (in one or two sentences) any differences you would expect to hear between these two pipes.[1]