Ultimate Wave Form Helix with Wooden Stand, 20cm Closed Height Type_Dual End A pair of pointer electrodes

A pair of pointer electrodes are supplied with the instrument

letting students route current down either branch of a circuit by choosing which slot the plug occupies

used to extend the activity-series comparison and to introduce the chemistry of the lead-acid battery

Simple-form wheel and axle with a larger wheel on a smaller axle

Ultimate Wave Form Helix with Wooden Stand, 20cm Closed Height Type_Dual End A pair of pointer electrodesMounted on a wooden display stand at 20cm closed height, this large helix produces transverse, longitudinal, standing wave, and interference patterns directly observable to a full classroom.