Now build a model of liquid water. Place your materials on a sheet of paper. The regular-size marshmallows can represent the larger oxygen atoms, and the mini marshmallows can represent the smaller hydrogen atoms. Connect the marshmallows with toothpicks using the picture as a guide. Create a total of four molecules. What was difficult about building the model?

Answer:   [a]:   "slate" .

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!

Ibelieve you go to settings