Steel and bronze plates, each 0.2 mm thick, are riveted at the ends so that at a temperature of 293 ° K they form a flat bimetallic plate. What will be the bending radius of this bimetallic strip at a temperature of 393° K? The coefficient of linear expansion of steel is a1 = l·105 l/deg, and of bronze a1=2·105 1/deg.
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