# U. 107 y. 10° Q.10 (kg/m) 0.9950 (kJ/kg.K) 1.009 (N.s/m?) 208.2 (mʻ/s) 20.92 k. 10 (W/m.K)...

###### Question:

u. 107 y. 10° Q.10 (kg/m) 0.9950 (kJ/kg.K) 1.009 (N.s/m?) 208.2 (mʻ/s) 20.92 k. 10 (W/m.K) 30.0 (m²/s) 29.9 Pr 0.700 Air at p = latm enters a thin-walled long tube at an inlet temperature of Tmi = 100 °C. The diameter and length of the tube are 5 mm and 2 m respectively. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is ṁ = 135 x 10-kg/s. (a) Is the flow laminar or turbulent? Justify your answer (3 pts). (b) Is the flow thermally fully developed in the tube? Justify your answer (3 pts).

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