The Temperature Gradient in a Wall Is 80º C/cm,and the Thermal

Multiple Choice

The temperature gradient in a wall is 80º C/cm,and the thermal conductivity of this wall is 4.0 $\times$ 10^-3 cal/s · cm · Cº.The amount of heat conducted per minute per square centimeter through this wall is approximately

A) 19 cal
B) 27 cal
C) 35 cal
D) 42 cal
E) 0.42 kcal