Demonstration Spherometer Subcategory_Weights and Masses supplying replacements when the originals

supplying replacements when the originals lose loft or split during repeated charging cycles

Red LED on a demonstration base with 4mm plug connections

supplying an inert electrode that conducts current without contributing its own ions to the cell reaction

the moderate curvature spreading light gently for divergence and virtual-image-formation work in refraction demos

Locking control at any extension on this two-meter retractable tape measure

Demonstration Spherometer Subcategory_Weights and Masses supplying replacements when the originalsDemonstration spherometer with an oversized 133 mm dial head and baked enamel finish, letting an entire classroom read spherometer values before students work with benchtop units.