An infinitely long pin fin, attached to an isothermal hot surface, transfers heat at a steady rate of Q̇1 to the ambient air. If the thermal conductivity of the fin material is doubled, while keeping everything else constant, the rate of steady-state heat transfer from the fin becomes Q̇2. The ratio Q̇2/Q̇1 is

An infinitely long pin fin, attached to an isothermal hot surface, tra

1.	An infinitely long pin fin, attached to an isothermal hot surface, transfers heat at a steady rate of Q̇1 to the ambient air. If the thermal conductivity of the fin material is doubled, while keeping everything else constant, the rate of steady-state heat transfer from the fin becomes Q̇2. The ratio Q̇2/Q̇1 is
A.	\(\dfrac{1}{\sqrt{2}}\)
B.	\(\dfrac{1}{2}\)
C.	2
D.	\(\sqrt{2}\)
Answer» E.

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