US$ 15.99
Mounted on a precision base
5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration
exposing the triangular rotor's epitrochoidal motion with a lamp-lit ignition point
Combining filtration and titration on one base
Push/Pull Balance, 250g/2.5N Material_Zinc Mounted on a precision baseTwo hundred fifty gram push pull balance in an acrylic tubular body, calibrated to 2. 5 newtons for measuring small forces during spring law and tension force classroom investigations.
US$ 15.99
US$ 94.95
US$ 39.00
US$ 35.99
US$ 27.99