On a day when the temperature is 20°C, a concrete walk is poured in such a way that its ends are unable to move.
(a) What is the stress in the cement when its temperature is 50°C on a hot, sunny day?
(b) Does the concrete fracture? Take Young's modulus for concrete to be 7.00 x 109 N/m2 and the compressive strength to be 2.00 x 107 N/m2.