. A power transmission line is hung from metal towers with glass insulators having a resistance of 1.00×109 Ω . What current flows through the insulator if the voltage is 200 kV? (Some high-voltage lines are DC.)

That big glowy thing in the sky is called the sun

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.