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Enjoy hours of educational fun while learning about electronics
mounted in a cradle base
Inside large lower patch pocket (when not in use
Without sacrificing size or key detail this three-part replica exposes the entire length of the ear canal and Eustachian tube so that the sound waves entering the ear can be easily traced and to demonstrate how air pressure on both sides of the eardrum is equalized
our full-color
Free Fall Tube measuring-tools-accessories Enjoy hours of educational funA very ecconomical apparatus to demonstrate that light and heavy objects fall at the same rate accelaration in a vacuum. Apparatus consists of a 36" (910mm) long x 2. 25" (55mm) diameter, transparent tube with a stopcock mounted in a rubber stopper on one end, and a solid rubber stopper on the other end. Supplied complete with a 13" long vinyl tubing for connection to a vacuum pump (not supplied), a metal disc and a feather. A very ecconomical
