Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets demonstrating mechanical advantage as the

demonstrating mechanical advantage as the angle of incline changes the effort needed to roll the cart up the slope

this regulated low-voltage DC power pack outputs a fixed +12V through front-panel terminals on the benchtop

the wider-range Wheatstone-bridge reference

Virtually friction-free 2-meter air track shipped with vehicles

Built on a leveled cast-iron base with a dual-angle polymer top

Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets demonstrating mechanical advantage as theWooden frame abacus on a 13. 5 by 9. 5 inch finished base, six steel wires carrying 20 beads each for hands on instruction in counting, place value, and basic arithmetic.