The most common lever in the human body is the . A. first class lever B. second class lever C. third class lever D. fourth class lever

Iwannasay c is the most accurate

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.

Newtons laws of motion

Answerinternal combustion engine fuel;