Question: A large vat used in food processing contains a hot oil at 400oF. Surrounding the vat on the vertical sides is a shell that is

A large vat used in food processing contains a hot oil at 400oF. Surrounding the vat on the vertical sides is a shell that is cooled to 140oF. The air space separating the vat and the shell is 35 cm high and 3 cm thick. Estimate the free-convection loss per square meter of surface area.

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