Compound Metal Strip

To Show The Effects Of Unequal Or Differential Expansion Of Two Different Metals. Comprising Two Strips, Each Of Different Metal But Of Same Size, Riveted Together End To End And Fitted On An Insulated Handle. On Heating, The Compound Strip Bends Into Curvature With Metal Having More Coefficient Of Expansion On Convex Side And Returns Back To Its Origil Shape On Cooling. (Copper And Iron; Size About 200 x 25Mm (L x W) )