Q1. A vertical cylinder 1.75m tall and 0.3m in diameter might be used to approximate a man for heat-trunsfer purposes (thernal conductivity, k=0.8/mC). Suppose the center temperature of the cylinder is 37C, the surface cmissivity is 0.9, and the cylinder is placed in a large room where the air temperature is 20C and the heat transfer coefficient is 20W/m20C and the wall temperiture is 10C. 1-Sketch the equivalent thermal resistance network. 2-Neglect the radiation and: - Calculate the heat lost from the from the cylinder. Determine the surface temperatures of the cylinder