Aluminum Leslie's Cube, 10 cm Sides Meters_Electrical Class-pack of economy handheld spectroscopes

Class-pack of economy handheld spectroscopes fitted with a rotating slit cap and internal diffraction grating for identifying constituent wavelengths in visible light sources

Metal spouting cylinder with multiple outlet holes at different heights

this ball bearing roller coaster kit demonstrates potential and kinetic energy conversion plus forces and motion concepts

The waves generate nodes & antinodes & their full wave length or half wave length can be measured

Demonstrates the metamorphic end-stage of coal maturation

Aluminum Leslie's Cube, 10 cm Sides Meters_Electrical Class-pack of economy handheld spectroscopesDemonstrates how surface finish affects thermal radiation, comparing the blackened, roughened, varnished, and polished faces of a water heated metal cube with an infrared sensor.