A 50 mm thick iron plate is initially at 225 225°C. Its both surfaces are suddenly exposed to air at 25 25°C with convection coefficient of 500 W/m 2 . (i) Calculate the centre temperature, 2 minute after the start of exposure. (ii) Calculate the temperature at the depth of 10 mm from the surface, after 2 minute of exposure. (iii) Calculate the energy removed from the plate per square meter during this period. Take thermophysical properties as: k = 60 W/m.K, ρ = 7850 kg/m 3 C = 460 J/kg α = 1.6 ×10 5 m 2 /s Requirements: Detailed | .doc file
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