The surface tension of water, a needed quantity in several of the following problems, is related to temperature according to the expression = 0.1232[1 − 0.00146 t], where is in n/m and t is in k. in the english system with given in ⁄ ft t in ℉, the surface tension may be calculated from = (8.44 × 10−3)[1 − 0.00082 t]. 1. water flowing at rate of 4000 kg/h through a 16.5-mm-id tube enters at 20℃. the tube outside diameter is 19mm. saturated atmospheric steam condenses on the outside of the tube. for a horizontal brass tube 2 m long, evaluate a) the convective coefficient on the water side. b) the convective coefficient on the condensate side. c) the exit water temperature. d) the condensation rate.