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Problem 4: A window manufacturer is treating glass for enhanced strength. The treatment involves immersing the glass into a salt bath at 300°C, where h 35W/m2K. The glass initial temperature is 25°C, has conductivity k 1.0W/mK, density p 4000kg/m3 and specific heat c 1200J/kgK Use the plane wall one-term approximation to estimate the centerline temperature of the glass after 1 hour, for (a) a glass thickness of 20mm, and (b) a glass thickness of 50mm.

engineering   Mechanical-Engineering   
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