Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets this handle-fitted bicycle wheel lets

this handle-fitted bicycle wheel lets students feel torque resistance in a spinning mass

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

3125 inches across

Hinged V-section arms grip lenses and mirrors up to 75mm in diameter

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

Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets this handle-fitted bicycle wheel letsWooden 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.