US$ 17.95
this metal helix lets stairwell-scale wave-propagation experiments amplify the visibility of standing waves
Benchtop hydro-electric power station at 13 by 9 by 7
Four-metal 32mm density cube set with hooks in brass
a compound unit for demonstrating multi-rope mechanical advantage in physics activities
2-Stroke Gasoline Hand-Crank Engine Model, 14" Base_Octagonal this metal helix lets stairwell-scaleTurning the hand crank walks students through every stage of the 2 stroke gasoline firing cycle on a 14 inch model, an ignition light firing on compression for visual timing.
US$ 17.95
US$ 17.95
US$ 17.95
US$ 21.90