Air Conditioners Flashcard

Front

What happens to the electrical energy that is not converted into useful energy in an electrical device?

Back

It is often converted into thermal energy.

Front

What type of energy does electrical energy transform into in a toaster?

Back

Thermal energy.

Front

What principle of energy is shown by cooling a fever with a washcloth?

Back

Energy is always transferred from warmer to cooler areas until equilibrium is reached.

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Front

What happens to the molecules during the cooling process with a washcloth?

Back

Faster-moving molecules of the hot forehead bump into slower-moving molecules of the washcloth, transferring kinetic energy.

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Front

Why is it necessary to replace the washcloth when cooling a fever?

Back

The washcloth and forehead will reach the same temperature, stopping the cooling effect.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

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Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion.

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Front

What is the principle of energy conservation?

Back

Energy cannot be created or destroyed; it can only be transformed from one form to another.

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Front

What is the role of a heat sink in electronic devices?

Back

A heat sink absorbs and dissipates heat away from electronic components to prevent overheating.

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Front

What is the relationship between temperature and molecular motion?

Back

As temperature increases, the motion of molecules increases, leading to higher kinetic energy.

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