Simple Machines Screw Model Foodsafe this Brownlee-pattern apparatus gives a

this Brownlee-pattern apparatus gives a clean visual proof of the 2:1 stoichiometry of water decomposition

Fits smaller bench spaces at half scale while retaining numbered removable organs and an included key card for student identification exercises

Replacement drive belt matched to the companion hand-crank Van de Graaff generator

this 6V-maximum electromagnet supports paper-clip-load measurements that reveal the linear relationship between input voltage and lifting force

Five 32mm ceramic ring magnets stack on a 150mm wooden dowel rising from a 5

Simple Machines Screw Model Foodsafe this Brownlee-pattern apparatus gives aSquare topped wooden screw simple machine model with a leverage block, letting students measure rotational distance against linear advance to derive the mechanical advantage of the spiral.