A steel wire of 2.0 mm 2 cross section at 30 C is held straight (but under
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A steel wire of 2.0 mm2 cross section at 30 °C is held straight (but under no tension) by attaching its ends firmly to two points a distance 1.50 m apart. (Of course this will have to be done out in space so the wire is weightless, but don’t worry about that.) If the temperature now decreases to -10 °C, and if the two tie points remain fixed, what will be the tension in the wire? For steel, α = 1.1 × 10-5 °C-1 and Y = 2.0 × 1011 N/m2.
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If it were free to do so the wire would contract a distance AL as it cooled where AL aL AT ...View the full answer
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