The water level in a vertical glass tube 1.00 m long can be adjusted to any position in the tube. a tuning fork vibrating at 653 hz is held just over the open top end of the tube, to set up a standing wave of sound in the air-filled top portion of the tube. (that air-filled top portion acts as a tube with one end closed and the other end open.) take the speed of sound to be 343 m/s. (a) for how many different positions of the water level will sound from the fork set up resonance in the tube’s air-filled portion