Air Puck, perfectly balanced and glides on a cushion of air for nearly frictionless motion across any smooth surface. Sturdy bumpers will survive collisions with walls, shoes, or other Air Pucks.
Effect of Salinity on Seawater kit, Includes: Phenolphthalein Indicator, 1M Potassium Chromate, 0.1M Silver Nitrate, 3M Sodium Hydroxide, Synthetic Atlantic Ocean Water, Gulf of Mexico Water and Pacific Ocean Water, has enough materials for 15 groups
precise project launcher, 16 mm steel balls at ranges suitable for use on the bench top or from the bench to the floor, protractor and plumb line make it easy to set any required launch angle from 45 deg downwards to straight up
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