Work done on a system puts energy into it. Work done by a system removes energy from it. Give an example for each statement.
The example of each statement is for work done on the system example is a heater the work is done on the principle of heating joule where heating element inside energy is converted from electric to heat.
The example of each statement is for work done by the system example is refrigerator the work is done on the principle of cooling through evaporation,an evaporating gas called a refrigerant draws heat away by cooling entire area.