Air core solenoid, coils wound on a plastic tube with approximately 575 turns of copper wire, can carry a current of 5A continuously or 10A intermittently.
Racing Rings consists of three rods one each of copper, aluminum and PVC, Ring magnet is dropped down the PVC rod, it falls unobstructed, Two metal rods create an induced magnetic field to that adds resistance to the rings travel, metals are different, they fall at different rates
Specific Heat Demonstration Set, Unique way to illustrate the different heat capacities of various metals features a slanted panel with four grooves to hold metals, Includes four metals cylinders: Aluminum, Copper, Lead and Tin; support stand, two pieces of bee wax