A heated 6-mm-thick Pyroceram plate (ρ= 2600 kg/m3 , cp = 808 J/kg · K, k = 3.98 W/m2 · K, and α = 1.89 × 10-6 m2 /s) is being cooled in a room with air temperature of 25°C and convection heat transfer coefficient of 13.3 W/m2 ·K. The heated Pyroceram plate had an initial temperature of 500°C. and is allowed to cool for 286 seconds. If the mass of the Pyroceram plate is 10 kg, determine the heat transfer from the Pyroceram plate during the cooling process using (a) Table 18-2 and (b) Figure 18-15.
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