US$ 49.99
low-consumption fan motor
5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration
Meter-stick optical bench fitted with two supports
Topped with a large conductor sphere and a deflecting needle indicator
Needle valve and flame stabilizer add precision control to this nickel-plated micro Bunsen burner running on natural gas for small-flame work
Chrome Steel Horseshoe Magnet, 5.75 x 2" Subcategory_Spring Scales low-consumption fan motorPole gap geometry on this 5. 75 x 2 inch chrome steel horseshoe puts a stronger gap field on offer than the 4 inch model, anchoring side by side magnet strength comparisons for the classroom.
US$ 49.99
US$ 19.00
US$ 79.00