Under Steady State Conditions, a Piece of Wood 350 Mm

Multiple Choice

Under steady state conditions, a piece of wood 350 mm by 350 mm and 15 mm thick conducts heat through its thickness and loses no appreciable heat through its well-insulated sides. The rate of heat flow is measured to be 14.0 W when the temperature difference across its thickness is 28 C°. Determine the thermal conductivity of this wood.

A) 9.2 × 10^-4 W/(m∙C°)
B) 270 W/(m∙C°)
C) 16 W/(m∙C°)
D) 0.061 W/(m∙C°)
E) 33 W/(m∙C°)