A $210-$m long bridge is improperly designed so that it cannot expand with temperature. It is made of concrete with $=1\mathrm{.}10x10-5C-1.$ Assuming that the maximum change in temperature at the site is expected to be $27C,$ find the change in length the span would undergo if it were free to expand.

a$.$ mm

If the maximum stress of the bridge, described above, can withstand without crumbling is $2\mathrm{.}0{10}^{7}Pa,$ will it crumble because of this temperature increase? Young's modulus for concrete is about $2\mathrm{.}0{10}^{10}Pa.$

a$.$ Yes or No

b$.$ What is the maximum stress?