Question: Consider a 10-m long smooth rectangular tube, with a=50 mm and b=25mm, that is maintained at a constant surface temperature. Liquid water enters the tube

Consider a 10-m long smooth rectangular tube, with a=50 mm and b=25mm, that is maintained at a constant surface temperature. Liquid water enters the tube at 20C with a mass flow rate of 0.01kg/s. Determine the tube surface temperature necessary to heat the water to the desired outlet temperature of 80C

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