1 A farewell or final appearance, action, or work. 2  The beautiful legendary song sung only once by a swan in its lifetime, as it is dying.
A person converts chemical potential energy into kinetic/mechanical energy when he walks. The chemical potential energy usually takes the form of adenine triphosphate (ATP) st â¦ ored in the body.
1 An example of mechanical energy is the wind as it turns a windmill. 2  Heat energy is energy that is pushed into motion by using heat. 3  An example is a fire in your fireplace. 4  Chemical Energy is energy caused by chemical reactions.