A medical device used for handling tissue samples has two metal screws, one 20.0 cm long and made from brass (α b = 18.9 ∙10–6 °C-1 ) and the other 30.0 cm long and made from aluminum (α a = 23.0∙10–6 °C-1 ). A gap of 1.00 mm exists between the ends of the screws at 22.0 °C. At what temperature will the two screws touch?
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