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Teacher Developed Classroom Tested

A vast improvement over traditional models, this air column resonance apparatus does not utilize any cumbersome moving reservoirs. Instead, the water level in this column is adjusted by air pressure in a fixed, closed reservoir using a pipette filler with a three-way valve system, which gives students precise control of the water level with less mess. An extruded support holds the water column firmly in place and carries a built-in scale and level marker for convenient column length measurements. The column length of 120 cm allows at least three resonance maxima to be observed with a 256 Hz excitation frequency, and more if higher frequencies are used. An optional probe bracket allows a microphone to be positioned close to the tube mouth for measurements using probeware. Includes an easily adjustable tuning fork bracket. Requires tuning forks, not included. Size: 151 cm x 44 cm x 30 cm; weight: 6.4 kg.
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