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HL0910-001
Conductivity Ring, 4 different metals
The IEC Conductivity Ring is the classic device to demonstrate the different heat conductivity of different metals. A strong cast ring holds a strip of brass, copper, iron and aluminium such that they meet at the central point. This central point is heated over a flame and a small piece of wax is placed in the depression provided at the tips of each strip.
The melting of the wax indicates the ability of each strip to conduct heat. Each strip is stamped with the initial of the metal used.
PA4260-002
Spring ("Slinky") 75x110mm for wave demonstration
Wave Demonstration Spring, short fat 'slinky' spring only. 75x110mm DxL. Good quality and well tempered spring material, plated against corrosion. Stretches to about 10m long and is used to demonstrate longitudinal wave motion.
