US$ 369.00
5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration
Mounted on a precision base
Pair of 12 by 3
Hand-cranked 4-stroke gasoline engine model at 13
endodermis
Push/Pull Balance, 250g/2.5N Material_Zinc 5 by 4-inch ventilation apparatusTwo 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$ 369.00
US$ 37.01
US$ 53.20
US$ 499.50
US$ 1124.00
US$ 565.92