A bare-footed person whose feet are at 32C steps on a large aluminum block at 10C.
(a) Treating both the feet and the aluminum block as semi-infinite solids, determine the contact surface temperature.
(b) What would your answer be if the person stepped on a wood block instead? Take the sqrt(k*rho*cp) value to be 24 kJ/m^2-k for aluminum, 0.38 for wood, and 1.1 for human flesh.