FIRST LAW OF THERMODYNAMICS
Law Conservation Of Energy We know that energy exists in different forms such as nuclear energy ,chemical energy , electric potential energy , elastic energy , radiant energy, thermal energy and sound energy etc. All these energies can be changed from one form to another form. However, these energies cannot be created or destroyed. NOTE: Energy can neither be created nor destroyed. It only changes from one form to another. the total amount of energy remains constant in a system. EXAMPLE OF LAW CONSERVATION OF ENERGY. 1. When the driver applies the brakes on a moving car, the brakes will be rubbed against the car wheels. Hence the mechanical energy of a car is changed in to heat energy due to friction between the brakes and moving car wheels. 2. In electric ovens, t...