An object falls from rest over a high cliff with an acceleration of 10 m/s.
(a) What is its velocity after (í) 1s, (ii) 2 s, (iii) 3 s, (iv)
4s, (v) 5s?​

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.

Answermuch larger;