American Educational Coin and Feather Apparatus with Plastic Tube, 47" Length x 6" Width x 6" Height

Coin and feather apparatus with plastic tube. Also known as the Guinea Feather Apparatus this provides a great visual demonstration to teach your students about air resistance. The cylinder is capped with a hard rubber closure at each end and a hose connector at one end, which is used for air evacuation. When the tube is inverted and the air is removed, the disc and feather will fall at the same rate as the feather does not meet any air resistance. Measures 47" length by 6" width by 6" height.