Independence of Motion, enables the Projectile Launcher to perform the classic experiment where one ball is dropped as another is projected horizontally. The balls strike the floor simultaneously. A built-in level makes leveling th
Dry Field Mapping Kit, includes cork-covered base, 30cmx26cm; pad of 25 sheets pre-printed conductive paper 28cmx21.5cm; pad of 100 sheets preprinted paper for drawing fields; ten metal-headed push pins; a silver conductive pen
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