A circular pipe with inner diameter of 0.02 m has its inner surface covered with water at 300K. Dry air is flowing inside the pipe at the velocity of 0.8 m/s. The temperature of air is 300K and its pressure is at 1 atm. Calculate: a) Mass transfer from the 0.01 m length pipe b) Rate of heat transfer from pipe to air by mass convection and heat convection

Please don't give image based answer..thanku Question:- Water vapor enters a continuous flow adiabatic turbine at 9 MPa pressure, 450 o C temperature and 188 m/s velocity, and exits at 50 m/s speed at 20 kPa pressure and 92% dryness. Calculate the turbine inlet cross-sectional area since the mass flow rate of the steam is 12kg/s.

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air is flowing inside of a pipe with radius=0.4 meters at a mass velocity of 29.4 kg/s*m2 at 322 K, with the walls of the pipe at 300 K. At the conditions of the experiment, the viscosity of air is 1.984 x 10-5 Pa*s, the density of air is 1.22 kg/m3, the heat capacity is 1 kJ/kg*K, and the thermal conductivity is 0.025 W/m*K. Determine the rate of heat loss by air per meter of duct.