Description

Five-cylinder equal-mass set at 30g each in zinc

deflecting a pivoting cobalt-steel compass needle inside a rectangular conductor frame to show that current generates a magnetic field

this 20mm-diameter steel helix carries longitudinal

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Glass Lens Set, 2", 6 Optical Types Pack Size_6 Five-cylinder equal-mass set at 30gGround, polished, and packaged as a single optics kit, this six lens glass set covers double convex, double concave, plano convex, plano concave, and concavo convex forms for classroom work.

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Glass Lens Set, 2", 6 Optical Types Pack Size_6 Five-cylinder equal-mass set at 30g

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