Thermal Conductivity Star Chemistry Demonstrates that charge resides only

Demonstrates 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

5% ±2 digit accuracy on a 3-1/2 digit LCD

deliberately using non-standard graduations to build empirical reasoning

Economical minute timer setting intervals up to one hour via a top knob

using metal bearings to minimize friction in uniform-acceleration and Newton's-second-law work

Thermal Conductivity Star Chemistry Demonstrates that charge resides onlyFour metal conductivity star with copper, brass, aluminum, and iron rods radiating from a central heated disc, letting students see conduction rate differences in one view.