Gold Leaf Electroscope Racks & Stands_Pipette & Burette Stands Adjustable parallel-plate capacitor with two

Adjustable parallel-plate capacitor with two 120mm metal discs on an aluminum slide

and the conservation of angular momentum in rotational dynamics

Square die-cast alloy boss head with metal thumbscrews

this eight-fork steel set lets students hear and measure frequency

Base-mounted 2-stroke diesel engine model in aluminum and plastic

Gold Leaf Electroscope Racks & Stands_Pipette & Burette Stands Adjustable parallel-plate capacitor with twoSliding window gold leaf electroscope with anodized aluminum walls and an internal scale, registering induced or conducted charge through the Coulomb driven deflection of a single suspended leaf.