Air with temperature of 80 F is forced with a speed of 30 m/s through a copper tube with length of 1 meter and inner diameter of 2 millimeters. The copper tube has a temperature of -50 F. I want the air coming out of the tube to have a temperature of less than 0 F. Is my design enough or does the tube need to be longer? How do I calculate what the outcoming air temperature will be? I need to know this for a medical application so please advise. Any useful equation would be helpful too. Also, what is the required PSI of air in order to force it through said tube? Thanks in advance.