Faraday's Butterfly Net Electricity & Magnetism_Circuits sized so that students can

sized so that students can compare its uniform-curvature surface charge against sphere and cone partners in the conductor set

and pith for stem anatomy and plant tissue teaching

the shared mass isolating volume and density as the distinguishing variables across metals and polymers

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

and upper airway structures in a single anatomical plane

Faraday's Butterfly Net Electricity & Magnetism_Circuits sized so that students canDemonstrates that charge resides only on the outer surface of a conductor by inverting the charged net inside out and showing the charge transferring to the new outside layer.