physics
posted by Anonymous .
A steel rod of length 1 m is welded to the end of an aluminum rod of length 2 m (lengths measured at 23 °C). The combination rod is then heated to 198 °C. What is the length of the combination rod at 198 °C? (The linear expansion coefficients for steel and aluminum are 1.3 105 °C−1 and 2.2 105 °C−1, respectively. Enter your answer to three significant figures.)
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