Consider a tube filled with air (at 17 °C) and open at both ends. Let the length of the tube be 70 cm.
(a)What is the fundamental (lowest) resonance frequency in this tube?
(b)Draw the node-antinode pattern of the next 2 higher resonant frequencies. What is the value of those frequencies? Do the frequencies follow a pattern of 1,2,3,4,.... Or is the pattern 1,3,5,7,... ?
(c) If one end is now closed (the other end is still open), what will be the fundamental resonance frequency? What is the pattern of the higher harmonics?