2 bimetallic strips have identical shapes. One is made 4rm aluminum & steel, the other made 4rm copper & silve

Question

Which is likely to bend more for a given change in temperature?

please explain best as possible

Two bimetallic strips have identical shapes one is made from aluminum and steel, while the other is made from copper and silver. Which is likely to bend more for a given chance in temperature? Justify your answer.

Thanks

Answer 1

Coefficient of Expansion
Silver 10.9
Coppers 9.8 7.7 avg 8.75
Aluminum & its Alloys 13.7 11.7 avg 12.7
Alloy Steels 8.6 6.3 avg 7.45
Diff al & steel 5.25
Diff cu & ag 2.82
al & steel will bend more the difference in COE is greater