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DIS ignition coils
Insulated I-type 9V battery snap with 6-inch red and black leads
the shared mass isolating volume and density as the distinguishing variables across metals and polymers
metal roller
Plano-Cylindrical Concave Lens, +17 Diopter, 50 x 50mm Science at Home_Life Science DIS ignition coilsPlano cylindrical lens at 50 by 50mm with 17 diopter optical power and ground polished edges, the cylindrical curvature focusing light to a line rather than a point in optics demos.
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