Consider a 5 cm diameter pipe whose outer radius is maintained at 200C. The pipe is exposed to a convection environment h=5 W/m^2C, Tinfinity=20C. Determine the heat loss per unit length (W/m) from the pipe under the following circumstances: i) There is not insulation on the pipe. ii) The pipe is wrapped with insulation (k=0.2 W/m^2C) having the critical radius.