Zoe is striking a tuning fork that is held near the mouth of a narrow plastic pipe that is partially underwater. The plastic pipe is raised and the first sound is heard when the air column is 9.0 cm long. The temperature in the room is 20ºC. Calculate the length of the sir column for the 2nd and 3rd resonances. a) 27.5 cm and 56 cm Ob) 0.18 and 0.30 m c) 13.5 m and 22.5 cm d) 0.27 m and 0.45 m
