Three parts of a car that uses electrical energy are: battery, alternator, and engine. The battery is the primary source of electrical energy, the alternator is the heart of the vehicles electrical system, and the engine has the mechanical energy. Electrical energy changes into another form of energy in each part of the battery, alternator, and engine by using electrochemical reaction into electrical energy in the battery, than mechanical energy into electrical energy in the alternator, and mechanical energy is used to run the engine.
Your answer is: Battery, alternator, engine. Battery: electrical energy to mechanical energy; Alternator: mechanical energy to electrical energy; Engine: mechanical energy.
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