Abalanced y-connected load having an impedance of 60 - j45ω/ϕ is connected in parallel with a balanced δ-connected load having an impedance of 902√∠45∘ ω/ϕ. the paralleled loads are fed from a line having an impedance of 2 + j2ω/ϕ. the magnitude of the line-to-line voltage of the δ-load is 240 3√ v.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature