These would be cells. Without cells (which are made up of atoms and molecules — which are also the things non-living things are made up of), our bodies (or the body of any living being) wouldnt be able to function. Not all living beings have organs, such a single-cell beings.
Efficiency is defined as the
measure of the amount of work or energy is conserved in a certain process. At
all times, in every process, work or energy is always lost or wasted due
to certain interference. Not all work given is converted to useful work or
energy. Thus , efficiency is calculated by dividing the energy or
work output to the energy or work input then the value is multiplied by
100 to express efficiency as percentage.
Efficiency = (energy output / energy input)
0.50 = kinetic energy produced / 150 kcals chemical energy
<span>kinetic energy produced = 75 kcals</span>