Wooden Adjustable Organ Pipe, 34.5" Physics_Electricity & Magnetism Truncated-cone stainless-steel coil 18cm long

Truncated-cone stainless-steel coil 18cm long with brass wire windings and a 9-9

the f/3 curvature stretching the focal throw for demos that need the focal point set comfortably beyond the mirror face

proglottids

and visceral organs in a combined lab-ready model

Wider 70 x 20 x 8mm cross-section on this Alnico bar pair gives a broader pole face than typical bar magnets

Wooden Adjustable Organ Pipe, 34.5" Physics_Electricity & Magnetism Truncated-cone stainless-steel coil 18cm longPolished wooden organ pipe 34. 5 inches long with no fixed pitch, sliding through a full octave from C5 (521Hz) to C6 (1024Hz) for hands on comparison of length to fundamental frequency.