Water at the rate of 0.8 kg/s at 93oC is forced through a 5-cm-ID copper tube at

Question:

Water at the rate of 0.8 kg/s at 93oC is forced through a 5-cm-ID copper tube at a suitable velocity. The wall thickness is 0.8 mm.Air at 15oC and atmospheric pressure is forced over the outside of the tube at a velocity of 15 m/s in a direction normal to the axis of the tube. What is the heat loss per meter of length of the tube?