Selectable DC Battery Eliminator Power Supply, 1.5-12V 2A Material_Wood 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 15-inch motion-converter model shows the engineering principle behind crankshaft pistons and rotary-to-linear mechanisms

and 0-50 psi / 0-3

Needle valve and flame stabilizer add precision control to this nickel-plated micro Bunsen burner running on natural gas for small-flame work

Selectable DC Battery Eliminator Power Supply, 1.5-12V 2A Material_Wood demonstrating mechanical advantage as theSelectable DC voltage at 1. 5, 3, 4. 5, 6, 7. 5, 9, and 12 volts on this 2 amp battery eliminator power supply, replacing batteries in physics and electronics classroom experiments.