NOR Logic Gate, 2-Input Heat & Thermodynamics_Energy Transfer & Engines each 30g with lengths varying

each 30g with lengths varying by density for water-displacement and calorimetry work

Square-topped wooden screw simple-machine model with a leverage block

this decade box substitutes for fixed resistors across a broad range of circuit work

Glass tube 33 inches long with a cork piston riding on a stable wooden base

Long-and-wide 95 x 20 x 8mm Alnico bar pair

NOR Logic Gate, 2-Input Heat & Thermodynamics_Energy Transfer & Engines each 30g with lengths varyingUniversal 2 input NOR gate module with red green LED outputs and a printed truth table, the second universal logic gate that complements the NAND for any digital circuit construction.