Square Friction Cube With Hook, 4 Surfaces, 2 Inch, Provides Four Surfaces For Exploration Into The Force Of Friction. Each Side Of The 2in Cube Provides A Surface (Wood, Paper, Vinyl, Sandpaper) With A Different Coefficient Of Friction
Laser Diffraction Kit, lets students create, view, and measure diffraction and interference patterns, kit includes two laser pointers-red and green - along with a convenient mounting base and a slide set of diffraction objects