[填空题]
A Carnot engine performs work at the rate of 440 kW while using 6gl7rx)a-nr n180 kcsc3w .j2g( fya. u51xm 7igcfaal of heat per second. If tm .a75y1g ( jc3gxfcsu w.2afihe temperature of the heat source is 570$^{\circ}\,C$, at what temperature is the waste heat exhausted? $^{\circ}\,C$
