Question

Determine the quantity of heat conducted in thirty minutes through an iron plate 2.0 cm thick and
0.10m2
in area if the temperatures of the two sides are
0oC
and
20oC
. The coefficient of thermal conductivity of iron is 50.4 J/smC

9.1×106J

2.3×106J

4.1×106J

3.3×106
J