Faraday's Butterfly Net Electricity & Magnetism_Circuits the shared mass isolating volume

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

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

and lead with densities from 2

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

5-inch diameter artery cross sections reveals atherosclerosis

Faraday's Butterfly Net Electricity & Magnetism_Circuits the shared mass isolating volumeDemonstrates 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.