Copper Specific Gravity Cylinder with Hook Category_Lab Equipment providing the standard mid-range value

providing the standard mid-range value for current-limiting LEDs and dropping resistors in student circuits

showing that air resistance — not mass — accounts for differences in fall time under gravity

Square-section aluminum tube 1 meter long with side graduations and four sliding riders

a battery-free source of partial vacuum for bell-jar demonstrations without external power

Aluminum 40cm precision force table with tapped pulley positions and central ring assembly for resolving and composing force vectors under equilibrium conditions

Copper Specific Gravity Cylinder with Hook Category_Lab Equipment providing the standard mid-range valueCopper 2 by 0. 5 inch specific gravity cylinder with a top hook for density and specific heat work, a distinctive density reference against the lighter aluminum and heavier steel cylinders.