Front

What form of energy is produced when you rub your hands together?

Back

Thermal energy is produced when you rub your hands together.

Front

What type of energy is required for an electric fan to operate?

Back

An electric fan requires both mechanical energy (to rotate the blades) and electrical energy (to power the motor).

Front

What is an example of sound energy that originates from electrical energy?

Back

Speakers at a football game are an example of sound energy that has electrical energy as its source.

Front

What must happen for sound to be heard when playing a guitar?

Back

The strings must vibrate, and the sound must travel in waves.

Front

What sensation did Williams experience when the sandpaper touched his arm?

Back

Williams noticed that the sandpaper felt hot against his skin.

Front

Define thermal energy.

Back

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

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object that is used to do work.

Front

Explain the relationship between sound energy and vibrations.

Back

Sound energy is produced by vibrations that create waves in a medium, such as air, which can be heard when they reach the ear.

Front

What is the principle of energy transformation?

Back

The principle of energy transformation states that energy can change from one form to another, such as electrical energy to sound energy.

Front

What is the role of electrical energy in everyday appliances?

Back

Electrical energy powers appliances, allowing them to perform functions such as heating, cooling, and sound production.