35. Explain why the pipes in a steam-heating system need to be insulated. 36. Is outer space a good conductor or a good insulator for thermal energy? Explain 37. On a hot day, which would stay cool longer, a sheet of aluminum (specific heat 920 J/kg K) or copper (specific heat 380 J/kg K)? Why? 38. Convert 2 C to F (show your work) 2pts. 39. Describe the complete cycle of operation of a forced-air heating system in a one-story house with the furnace in the basement. 40. (2pts)Convert temperatures C-$/9(F-32) or F-9/S C+32 Convert 4 F to C (show your work) 41. ( 5 points each) List in order and describe the four strokes of the internal combustion engine. A B C. D