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30C) day. You grab an ice-cold cherry cola (Ts = 0C) on a hot (Too The can has a diameter of D = 0.1
30C) day. You grab an ice-cold cherry cola (Ts = 0C) on a hot (Too The can has a diameter of D = 0.1 m and a height of H = 0.2 m. Properties of air at 1 atm pressure Temp. T, C 0 5 10 15 20 25 30 35 Density p, kg/m a) 12.2 W b) 16.7 W c) 20.0 W d) 25.6 W 1.292 1.269 1.246 1.225 1.204 1.184 1.164 1.145 Specific Heat Cp, J/kg.K 1006 1006 1006 1007 1007 1007 1007 1007 Thermal Conductivity k, W/m-K 0.02364 0.02401 0.02439 0.02476 0.02514 0.02551 0.02588 0.02625 = Thermal Diffusivity a, m/s 1.818 x 10-5 1.880 x 10-5 1.944 x 10-5 2.009 x 10-5 2.074 x 10-5 2.141 x 10-5 2.208 x 10-5 2.277 x 10-5 Dynamic Viscosity , kg/m-s 1.729 x 10-5 1.754 x 10-5 1.778 x 10-5 1.802 x 10 1.825 x 10-5 1.849 x 10-5 1.872 x 10-5 1.895 x 10-5 Kinematic Viscosity v, m/s 1.338 x 10-5 1.382 x 10-5 1.426 X 10-5 1.470 x 10-5 1.516 x 10-5 1.562 x 10-5 1.608 x 10-5 1.655 x 10-5 Determine the heat flow out of the side of the cola can. Use the approximation of a vertical wall. Check that the condition D > holds. (yes/no) 35H Gr-0.25 Prandtl Number Pr 0.7362 0.7350 0.7336 0.7323 0.7309 0.7296 0.7282 0.7268 A plate at 80C is cooled by forced convection by air. The velocity of the air is 5 m/s with the temperature of 0C. The plate measures 10 cm width by 10 cm length. Find the heat transfer. Use properties from problem 3. a) 21.8 W b) 25.6 W c) 32.1 W d) 37.6 W
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