Which are uses of lasers? Check all that apply. scanning barcodes transmitting telephone and Internet signals examining internal body parts cutting through metals, ceramics, plastics, and cloth correcting vision problems

Ithink the answer would be 1,350!

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.