Under Steady State Conditions,a Piece of Wood 350 Mm by 350

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°)