The coefficient of linear expansion of steel is 12 × 10-6 k-1. what is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 k from winter to summer?
a.1.2 cm
b.1.8 cm
c.1.4 cm
d.2.0 cm
e.1.6 cm
In this question, the length of the bridge is 25m, the coefficient of linear expansion is 12 × 10^-6/K and the change of temperature is 40K. Then the calculation of the changes of the length would be:
