4-Metal Equal Mass Cylinders Set (Copper, Iron, Aluminum, Zinc) Capacity_500mL Hand-driven Newton's color disc that

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

Triple-parallel plastic pulley with three 50mm wheels on a steel frame with end hooks

letting students explore induction

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

with two 4mm terminal posts

4-Metal Equal Mass Cylinders Set (Copper, Iron, Aluminum, Zinc) Capacity_500mL Hand-driven Newton's color disc thatFour 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.