A long Pyroceram rod (ρ = 2600 kg/m3 , cp = 808 J/kg · K, k = 3.98 W/m · K, and α = 1.89 × 10-6 m2 /s) with diameter of 10 mm has an initial uniform temperature of 1000°C. The Pyroceram rod is allowed to cool in ambient temperature of 25°C and convection heat transfer coefficient of 80 W/m2 ·K. If the Pyroceram rod is allowed to cool for 3 minutes, determine the temperature at the center of the rod using (a) Tabic 18-2 and (b) the Heisler chart (Figure 18-16).
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