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QUESTION
Air at 1atm enters a 5cm diameter tube at 20C with an average velocity of 5m/s. The tube wall is maintained at a constant surface temperature of...
Air at 1atm enters a 5cm diameter tube at 20C with an average velocity of 5m/s. The tube wall is maintained at a constant surface temperature of 160C, and the outlet mean temperature is 80C. Estimate the length of the tube.
