A large concrete slab 1 m thick has one-dimensional temperature distribution
T = 4 - 10x + 20x2 + 10x3
Where T is temperature and x is the distance from one face towards the other face of the wall. If the slab has a thermal diffusivity of 2 × 10-3 m2/hr, what is the rate of change of temperature at the other face of the wall?
1
0.1°C/h
2
0.2°C/h
3
0.3°C/h
4
0.4°C/h