Atmospheric air at 10?C enters a 2 m long smooth rectangular duct with a 7.5 cm x 15 cm cross-section. The mass flow rate of the air is 0.1 kg/s. If the sides are at 150?C, estimate(a) The heat transfer coefficient,(b) The air outlet temperature,(c) The rate of heat transfer, and(d) The pressure drop.GIVENAtmospheric air flow through a rectangular ductInlet bulk temperature (Tb,in) = 10?CDuct length (L) = 2 mCross-section = 7.5 cm x 15 cm = 0.075 m x 0.15 mMass flow rate (m) = 0.1 kg/sDuct surface temperature (Ts) = 150?CASSUMPTIONSSteady stateThe duct issmooth

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T.= 150°C 0.15 m Taout Alr Tain - 10°C 0,075 m L=2 m