Magnetic Needle with Brass Cup Bearing, 4", Carbon Steel Lab Equipment and Supplies_Racks & Stands and Lenz's law investigations

and Lenz's law investigations

Two-position copper plug key switch with 4mm terminals and two removable plugs

Virtually friction-free 2-meter air track shipped with vehicles

Pole-gap geometry on this 5

Six-piece polypropylene beaker set spans 50mL to 2000mL for complete classroom and lab volumetric workflows without glass breakage risk

Magnetic Needle with Brass Cup Bearing, 4", Carbon Steel Lab Equipment and Supplies_Racks & Stands and Lenz's law investigationsUsed as a sensitive direction finder when paired with a tangent compass stand, this 4 inch carbon steel needle pivots on a brass cup bearing for low friction rotation under the local field.