A steel ruler is calibrated to read true at 20.0 C. A
Chapter 12, Problem 12.83(choose chapter or problem)
A steel ruler is calibrated to read true at 20.0 C. A draftsman uses the ruler at 40.0 C to draw a line on a 40.0 C copper plate. As indicated on the warm ruler, the length of the line is 0.50 m. To what temperature should the plate be cooled, such that the length of the line truly becomes 0.50 m?
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