Resonance Apparatus with Stand Investigate the length, frequency and velocity of sound waves by studying the resonance of air columns. We attach a movable container to a 80 cm long transparent tube that is mounted on a stand. Fill the container with water and strike a tuning fork above the top of the tube. The reverberated tuning fork becomes louder or softer depending on the location of the water. Tuning fork not included. This item ships oversize, shipping will be calculated at checkout. Qty :