When you consume (eat) 105 J of chemical energy stored in food, how much of it has been transformed into kinetic energy that allows you to do daily activities?
The efficiency of the human body in converting chemical energy into kinetic energy is estimated to be around 20-25%. Therefore, if you consume 105 J of chemical energy stored in food, only 21-26 J of it will be transformed into kinetic energy that allows you to do daily activities.
