Hollow Acrylic Prism, cube, With Stopper - For Physics and Light Experiments, Hollow inside allows for liquid to be poured into cube, Great for physics classrooms, made from acrylic plates properly cemented together, Excellent tool for optical experiments, Size: 25x25x25mm
Hand Held Centripetal Force Kit, Kit Includes: Plastic Handle, Rubber Stopper, String, 20 Washers, 2 Paper Clips, Provides The Necessary Tools To Discover Properties Of Rotational Dynamics. A Rubber Stopper Swings Around On The End Of A String Counter Balanced
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