Question

A steel wire 1.5 mm in a diameter is just stretch between two fixed point at temperature 40℃ determine tension in the wire if the temperature falls 30℃. Given that the steel alpha=0.000012℃. for steel youngs modulus= 2×1000000000000N/square meter

Answer 1

stress=alpha*change in temp*youngs modulus
answer is 2.4 Mpa