A company is trying to cool its exhaust (450C ) before it heads to a filtration unit by flowing it across an 88 in-line tube bank. The tubes are 2cm in diameter, have a center-to-center spacing Problem 1: (40 points) of 4cm, and they are 0.75m long. The exhaust is moving at 6m/s (free stream velocity). You may assume the following physical properties for exhaunt remain constant: =0.40kg/m3,=3.9105kg/ms,c0=1,200J/kgC,k=0.064W/mC You may neglect temperature dependence of thermal properties. Recall: Pr c/k You may assume the tube bank has a surface temperature of 50C What is the exit temperature of the exhaust