Asolid sphere of radius a = 5 cm is centered at the origin. it is made of an insulating material and carries a uniform charge density with total charge q1 = +10 mu or micro cc. it is surrounded by a hollow, concentric conducting shell of inner radius b = 15 cm and outer radius c = 20 cm. the outer shell has total charge q = -5 mu or micro cc.

One splits the atoms and molecules  the other combines them

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.