a) What is the heat transfer coefficient? b) What is the specific heat flux? c) What is the significance of the Prandtl number? d) Calculate the heat transfer coefficient and the specific heat flux if you have a gas which flows at a speed of 12 m/s inside a pipe with an internal diameter of 30 mm. The gas has a temperature of 55C and is heated to 78.3C by the supply of steam outside the tube. If the gas pressure inside the tube is 319.4 KPa and the fluid characteristics are: NPr= 0.686, p= 1.19 Km/m, b=1.6x10-5 Pa*s, Hw=2.10x105 Pa*s and k= 0.0187 W/m. e) Concludes the physical meaning of the results obtained in point d.