US$ 175.12
demonstrating mechanical advantage as the angle of incline changes the effort needed to roll the cart up the slope
Hinged V-section arms grip lenses and mirrors up to 75mm in diameter
and airway anatomy at scale
the wider-range Wheatstone-bridge reference
3V 2A AC filament line for cathode-ray experiments
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.
US$ 175.12
US$ 293.50
US$ 243.00
US$ 148.12
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US$ 191.00
US$ 428.50
US$ 192.75
US$ 314.25
US$ 929.50
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US$ 367.50
US$ 187.00
US$ 49.99
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US$ 199.99