question_answer

A mass of 2 kg is suspended from a fixed point by a wire of length 3m and diameter 0.5 mm. Initially the wire is just unstressed, the mass resting on a fixed support. By how much must the temperature (in\[{}^\circ C\]) fall if the mass is to be entirely supported by the wire? (Y of wire\[=206\text{ }GPa,\alpha =11\times {{10}^{-6}}{}^\circ {{C}^{-1}}\])

Answer:

44.00