Hot water flows with a velocity of 0.1 m/s in a 100 mm long, 0.1 m diameter pipe. Heat lost from the pipe outer wall is uniform and equal to 420 W/m^2. If the inlet water temperature is 80 C, calculate the water temp at the exit. Neglect effect of pipe wall thickness. Cp (water) = 4.2 kJ/kg.K and density of water = 1000 kg/m^3
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