A two-layer has a total exposed surface area of 120 m2 per side. The temperature of the hotter side is 550oC; and the temperature for the cooler side is 200oC. The layer closer to the hotter side is 0.3 m thick and has a thermal conductivity of 200 W/m. K. The layer closer to the cooler side is 0.5 m thick and has a thermal conductivity of 50 W/m. K. Most nearly, what is the thermal resistance of the wall

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)