A cylindrical organ pipe 1.20m long is open at both ends. The speed of sound in air varies with temperature T (in ∘C) according to v=331+0.6Tms−1. Answer the following:
(i) Calculate the fundamental frequency of the pipe at 20∘C.
(ii) Determine the frequency of the second overtone at 20∘C.
(iii) The air in the pipe is now heated uniformly to 35∘C. Find the percentage increase in the frequency obtained in part (ii).