Star A has the same luminosity as star B. Also, star A is 3 times as far as Star B from Earth. Then star A is as bright as star B as seen from Earth.

Answer the above statement is ( false );

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.

Hi. i believe this is called a scientific  theory.cheers!

Mm: distances smaller than centimeters  km: for very large distanceshope this can i get brainliest