5B1

Conductivity Star

Thermal conductivity apparatus for use with a tea light / candle or small bunsen burner flame. The unit has an integral polished wooden handle and 5 metal rods (aluminium, brass, mild steel, copper and nickel) mounted in a brass centre block. Students can discover which metals conduct heat the most efficiently by placing a small amount of wax at the end of each rod and seeing which melts first when heat is applied to the centre block. Wax not included. Rod Dimensions (Dia. x L): 4 x 75mm.

Wood/Metal Cylinder

The wood/metal cylinder offers a nice demonstration of conduction and insulation. The apparatus consist of a copper tube attached to a wooden rod of equal diameter. A piece of paper is wrapped tightly around the central section, covering the wood and metal parts, then the rod/cylinder is passed through a Bunsen burner flame for a few seconds, making sure both wood and metal parts pass through the flame. The metal part conducts heat away so the paper hardly browns, but because the wood part is an insulator the paper covering gets scorched by the flame. Dimensions (L x Dia.): 190 x 22 mm