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THERMAL PROPERTIES OF MATTER

Thermal Expansion

Thermal Conductivity

Electric Field Lines

A waxed glass plate on an overhead projector is sprinkled with a relatively small amount of grass seed. Some chosen charge distribution is then placed on the plate (1 point charge, 2 point charges, 2 parallel plates, 2 concentric cylinders, etc.). The system is then ‘activated’ by charging the distribution to a relatively high potential (up to 15 kV). When the glass is tapped for a few seconds, the grass seed becomes polarized lengthwise and lines up with the electric field lines of the given charge distribution.

Electric Field Lines
Electric Field Lines