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Contains 15 specimens, approximately 1 1/2″ x 1 1/2″, number-coded in a compartmented container.
Lets your students actually observe increases and decreases in a liquid's conductivity!
The relationship between resources that are renewable in one human life span and the associated prod...
The solid state apparatus is a must for any physics class and is perfect for our air track and free ...
Knife Switch with Screw Type Binding Posts - Double Pole, Double Throw