Calculate the centripetal force of the athlete if the athlete's mass is 65 kilograms. An athlete completes 1 lap around a track with a radius of 25 meters in 180 seconds.

Sorry i don’t know what to do

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.