Asked by violet
Which statement is an example of the law of conservation of energy?
A soccer ball eventually stops because its energy disappears.
When a light bulb is turned on, electrical energy is converted to light and heat.
An automobile engine burns gasoline to converts its chemical energy to electrical energy.
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"When a light bulb is turned on, electrical energy is converted to light and heat."
Reason: the law of conservation of energy says energy is neither created nor destroyed but transformed from one form to another. The first statement is false (the ball's kinetic energy is dissipated into heat and sound, not disappeared). The third statement describes an energy conversion but is misleading—an automobile engine primarily converts chemical energy to mechanical energy (an alternator then converts some mechanical energy to electrical).
Reason: the law of conservation of energy says energy is neither created nor destroyed but transformed from one form to another. The first statement is false (the ball's kinetic energy is dissipated into heat and sound, not disappeared). The third statement describes an energy conversion but is misleading—an automobile engine primarily converts chemical energy to mechanical energy (an alternator then converts some mechanical energy to electrical).
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