An object moves from point x to point y in 20 s, where the velocity at x = 50 km/h and the velocity at y = 5.56 m/s, so the acceleration of this object is​

The answer to your is is c motion and shape

Ithink it is letter b, i may be wrong but i think that is the answer

When you go to ask a qustion there will be a picture of a paper clip looking thing and then it will pop up your files and you click on the imajes and then you up load it

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.