Garage Physics Magic Square Puzzle Kit Lab Supplies_Petri Dishes this 20-piece metallic ore specimen

this 20-piece metallic ore specimen set demonstrates the raw sources of industrial metals for classroom identification

sized to retain induced charge through demonstrations of Coulomb's law and surface charge distribution

Cover-protected single-phase rheostat with constantan winding and 4mm safety socket terminals

the wedge geometry producing minimal beam deviation for demonstrating small-apex thin-prism behavior

the low-resistance high-current option paired with PH1150H in the heavy-load family

Garage Physics Magic Square Puzzle Kit Lab Supplies_Petri Dishes this 20-piece metallic ore specimenMagic Square puzzle kit with wooden blocks that arrange into 3x3 grids where every row, column, and diagonal sums to the same value, illustrating arithmetic sequences and number theory.