4-Metal Equal Mass Cylinders Set (Copper, Iron, Aluminum, Zinc) Capacity_500mL this demonstration electroscope detects and

this demonstration electroscope detects and visually quantifies the magnitude of static charges

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

with two 4mm terminal posts

this Hall's car supports dynamics work on inclined planes with weights and pulleys

and inner ear sections support detailed auditory anatomy teaching at 3x enlargement for classroom visibility

4-Metal Equal Mass Cylinders Set (Copper, Iron, Aluminum, Zinc) Capacity_500mL this demonstration electroscope detects andFour cylinder equal mass set at 100g each in copper, iron, aluminum, and zinc, with lengths varying by density to isolate the mass volume density relationship for student investigation.