1. The problem statement, all variables and given/known data the bimetallic strip has a thickness x and is straight at temp T. What is the radius of curvature of the strip, R, when it is heated to temp T+dT Coeff. of linear expansion: a1, a2. Assume each each metal has a thickness of x/2 and X<<R 2. Relevant equations L1=L0(1+a1 dT) L2=L0(1+a2 dT) 3. The attempt at a solution I was givin the hint that: L2=(R+x/4)theta L1=(R-x/4)theta Where on earth do this +-x/4 come from?!