Crookes Radiometer, 2.75" (70mm) Diameter, on Plastic Base Subcategory_Racks and Stands Air-cooled 225-ohm 1

Air-cooled 225-ohm 1

this 2-input XOR gate module shows HI and LO output states with red and green LEDs and a printed reference

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

NPN transistor in a protective enclosure with labeled base

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 Air-cooled 225-ohm 1Evacuated 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.