Aflat horizontal surface with an area of 518 cm^2 is inside a uniform electric field of 1.33 x 10^4 n/c. the angle between the area vector and the electric field is 33.2°. what is the electric flux through the surface?

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

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.