Census tracts are spatial areas with about 5,000 people each and varying areas. Using the data on Chicago census tracts for 2010 (included on the spreadsheet Census Tract Data, downloadable from Blackboard), estimate a density gradient for Chicago in 2010. In particular estimate γ, from the equation: lg Density = lg (D0) – γx, where x is distance in miles from the CBD.

Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window