Crookes Radiometer, 2.75" (70mm) Diameter, on Plastic Base Subcategory_Racks and Stands 250mL CAPACITY || Single Erlenmeyer

250mL CAPACITY || Single Erlenmeyer Flasks with 250mL capacity and easy-to-read white enamel graduations every 50mL

NPN transistor in a protective enclosure with labeled base

this wooden block-and-tackle apparatus lets students count supporting strands and measure how each added pulley reduces effort

its small thermal capacity letting most heat transfer go to the sample during calorimetry work

Crookes Radiometer, 2.75" (70mm) Diameter, on Plastic Base Subcategory_Racks and Stands 250mL CAPACITY || Single ErlenmeyerEvacuated 2. 75 inch glass bulb on a plastic base with black and white vanes that spin under light exposure, the classic demonstration of differential radiant heat absorption.