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

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

and strings for equilibrium and vector experiments

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

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.