If an object is located 20 m to the right of the origin at 1:00PM and later the object is located 30 m to the left of the origin at 2:00PM, then the displacement from 1:00PM to 2:00PM is,

Caused conformity rates to go down. apex ; )

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.