Description
Wooden-frame abacus on a 13
supplied in a wooden case for full-classroom harmonic investigations
14 push buttons
delivering the stable filament power required for sustained spectroscopy work
bundle sheath
12-Piece Steel Extension Spring Set, 6-9" Physics_Force & Motion Wooden-frame abacus on a 13Twelve spring steel extension set paired across six size combinations with looped ends, offering a spread of spring constants for simultaneous comparison in oscillation and Hooke's Law experiments.
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