1d. A fluid is heated as it flows in a rectangular channel with a mass flow rate of 0.0004 kg/s, corresponding to a mean velocity of Um=0.72 m/s. The walls of the channel are isothermal. (i) Determine the hydrodynamic and thermal entry lengths, as well as the value of the heat transfer coefficient in the fully developed region. (ii) Sketch the variations of the mixed mean temperature and heat transfer coefficient in the figure below. Properties of fluid: p= 1.1 kg/m, = 23010 Ns/m, Pr = 0.7, k = 0.03 W/m-K Properties of wall: p = 8,200 kg/m, k = 60 W/m-K