In each cycle, a heat engine receives an input of 1540 j of heat and exhausts 1030 j of heat. what is the thermal efficiency? 0.274 0.456 0.669 0.331

The thermal efficiency of a combustion system is simply the ratio of heat out and heat in, that is:

efficiency = heat out / heat in

efficiency = 1030 J / 1540 J

efficiency = 0.669

 

So the efficiency is 0.669

Look it up you feel me

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.