When you warm a cup of cocoa in a microwave oven. First, the electric energy gets converted into wave energy then the wave energy is get converted into the heat energy of cocoa.
According to the law of conservation of energy, the energy of an isolated system stays unchanged throughout time; it is said to be conserved.
Energy can not be created nor be destroyed and can be transferred from one form to the other form.
When you warm a cup of cocoa in a microwave oven in that condition first the electric energy of the system gets converted into wave energy.
After that, the wave energy gets converted into the heat energy in the cup of cocoa.
Hence when you warm a cup of cocoa in a microwave oven. First, the electric energy gets converted into wave energy then the wave energy is get converted into the heat energy of cocoa.
To learn more about the law of conservation of energy refer to the link;
https://brainly.com/question/2137260
