Air at 1 atm and 10c flows over a bank of tubes (15 rows high and 10 rows deep) at an upstream velocity of 7 m/sec. tube surfaces are maintained at 65c. tubes are 2.54 cm in diameter and arranged in-line. st = 3.175 cm, sl = 3.81 cm. calculate total heat transfer per unit length & the exit air temperature.
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