US$ 30.00
Convertible motor-generator running AC or DC in shunt or series wound configurations
measuring sample acidity on a fixed workstation in laboratory quality-control and teaching environments
large enough for whole-class visibility when tracing magnetic field lines around bar magnets
Twelve-volt DC drive across two 600-turn coils delivers higher lifting force than 6V models
(use your imagination)
259-Atom Universal Tutorial Molecular Model Set Hypotenuse_35mm Convertible motor-generator running AC orTwo hundred fifty nine atom compact tutorial set at 15 20mm scale, providing enough parts for many simultaneous models in stereochemistry and functional group identification student work.