Consider a 10-m-long tube with a diameter of 8 cm, subjected to uniform heat flux from all surfaces. a fluid enters the tube at a velocity of 8 m/s. the properties of air at 25°c are k = 0.02551 w/m·°c, ν = 1.562 × 10–5 m2/s, and pr = 0.7296 and the properties of water at 25°c are rho = 997 kg/m3, k = 0.607 w/m·°c, ν = 8.937 × 10–7 m2/s, and pr = 6.14. determine the convection heat transfer coefficient if the fluid used is air.