Conservation of Energy Review

What is the most common form of waste energy?

• Chemical Energy 

• Thermal Energy 

• Mechanical Energy

• Kinetic Energy

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What is the Principle of Conservation of Energy?

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What cannot happen to energy according to the law of conservation of energy?

• Energy cannot be created

• Energy cannot be converted.

• Energy cannot be changed

• Energy cannot be transformed.

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What is the Law of Conservation of Energy?

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Friction is a force that opposes motion. When friction is present, heat is usually generated. According to the law of conservation of energy, which of the following statements is true about the energy associated with friction?

• It was not transformed from another type of energy

• The law of conservation of energy does not apply.

• Energy is created with friction.

• Some of the energy is converted into thermal energy.

The unit for energy is the joule (J). If the energy content of an object is 1,000 J, but then later it is found to be 900 J, what happened to 100 J of its energy?

• Energy was destroyed.

• The object transferred some of its energy to its surroundings.

• Energy was created.

• The object absorbed additional energy from its surroundings.

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Energy cannot be created nor destroyed, only changed from one form to another. How does listening to music on a radio obey the law of conservation of energy?

• Electrical energy is gradually destroyed as the radio plays.

• Electrical energy is converted into other forms of energy, such as sound.

• Sound energy is changed into potential energy.

• Electrical energy remains unchanged.

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What does this calculation result to

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