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Engine oil is heated by flowing through a circular tube of diameter D = 50 mm...

Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150 oC. The flow rate and inlet temperature of the oil are 0.5 kg/s and 20 oC. a. Estimate the outlet temperature Tm,o. B. Average Nusselt number C. Estimate the total heat transfer rate q for the tube.

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3-1Y.XO.05% 2.5 Let-out ut temp = ToNoto 大-D U So 3.14 xoosno.OB2) Now 蚝@rooy C%)Rem] Nuニ3.GC +2. 11.95- I +2.1eren and heat given =

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