(Solved): Consider a 25-mm-diameter and 15-m-long smooth tube that is maintained at a constant surface tempe ...

Consider a 25-mm-diameter and 15-m-long smooth tube that is maintained at a constant surface temperature. Fluids enter the tube at \( 50^{\circ} \mathrm{C} \) with a mass flow rate of \( 0.01 \mathrm{~kg} / \mathrm{s} \). Determine the tube surface temperatures necessary to heat water to the desired outlet temperature of \( 150^{\circ} \mathrm{C} \). urface he tube surface