5-Metal Hooked Density Cylinders Set (Copper, Tin, Aluminum, Zinc, Stainless Steel) Capacity_17mL 2mL graduations

2mL graduations

Rotary-knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections

this handle-fitted bicycle wheel lets students feel torque resistance in a spinning mass

this wooden simple-machine model lets students measure input effort against output splitting force at different wedge angles

Frontal and median head sections expose brain

5-Metal Hooked Density Cylinders Set (Copper, Tin, Aluminum, Zinc, Stainless Steel) Capacity_17mL 2mL graduationsFive cylinder equal mass set with hooks in copper, tin, aluminum, zinc, and stainless steel, each 30g with lengths varying by density for water displacement and calorimetry work.