Universal Multi-Size Polypropylene Test Tube Rack (30/20/17/12mm) Subcategory_Geology Models Solid carbon electrode bar that

Solid carbon electrode bar that conducts current without participating in electrochemical reactions

a low-cost option for introductory mechanical-advantage demonstrations

inline with mains-powered devices to show real-time power and energy consumption

comparing thermal-radiation emissivity from surfaces at identical temperature

one fitted with an exploder piston for impulse experiments

Universal Multi-Size Polypropylene Test Tube Rack (30/20/17/12mm) Subcategory_Geology Models Solid carbon electrode bar thatPolypropylene universal test tube rack accommodating 30 mm, 20 mm, 17 mm, and 13 mm tubes in a single base, eliminating the need for multiple racks at a classroom station.