Demonstration Spherometer Subcategory_Weights and Masses and steel cubes machined to

and steel cubes machined to the same 1

the wider bore accepting full-size bar magnets while AC current drives the alternating field that rotates domains for demagnetization

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

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

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

Demonstration Spherometer Subcategory_Weights and Masses and steel cubes machined toDemonstration 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.