Question: A vertical air gap contains air at 300 K and 1 atm. The spacing between the plates is 10 cm and the temperature difference is

A vertical air gap contains air at 300 K and 1 atm. The spacing between the plates is 10 cm and the temperature difference is 20oC. Estimate the percentage reduction in heat transfer that would result from lowering the pressure of the air to 10−6 atm. Use charts in this chapter.

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