Compound Bar Big Bimetal
Upon heating, the bar curls and bends because the riveted strips each have a different coefficients of thermal expansion. To demonstrate unequal expansion of different metals when heated equally. Consists of two strips, brass and steel riveted together from end to end fitted to a wooden handle. 
 
Dimensions :-
	
Metal part; 11 inch (280mm)L x 1.1 inch (30mm).
	
Total length 15.5 inch (395mm).