Crookes Radiometer, 2.75" (70mm) Diameter, on Plastic Base Subcategory_Racks and Stands this 2-input XOR gate module

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

Twelve-slot natural wood buret rack organizes vertical buret storage and simultaneous titration setup in chemistry and analytical laboratory classrooms

NPN transistor in a protective enclosure with labeled base

dimensioned as the matched replacement carriage for the LED ray box (PH0602ALED) track when an original rider is lost or damaged

Crookes Radiometer, 2.75" (70mm) Diameter, on Plastic Base Subcategory_Racks and Stands this 2-input XOR gate moduleEvacuated 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.