A strip of copper metal is riveted to a strip of aluminum. the two metals are then heated. the coefficient of linear expansion of aluminum is greater than that of copper. what happens?

We can base this on the equation of thermal expansion.

ΔL = L₀αΔT

where

ΔL is the expansion of length upon heating

L₀ is the initial length

α is the coefficient of linear expansion

ΔT is the temperature difference

So, if α for Aluminum is greater than α for Copper, then after heating, aluminum would be longer than copper.