5.2 Energy

Front

What is energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, such as mechanical, thermal, electrical, and sound.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object. It is the energy associated with the motion and position of an object.

Front

What is sound energy?

Back

Sound energy is a form of energy that is produced when an object vibrates, creating waves that travel through air or another medium.

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 particles in an object.

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons. It is commonly used to power devices and appliances.

Front

What is radiant energy?

Back

Radiant energy is the energy of electromagnetic waves, including light. It is the energy that travels through space and can be absorbed by objects.

Front

How does a violin produce sound?

Back

A violin produces sound by transforming mechanical energy from the bow into sound energy through the vibration of its strings.

Front

What energy transformation occurs in a hairdryer?

Back

A hairdryer transforms electrical energy into thermal energy to heat the air.

Front

What energy transformation occurs in a stove?

Back

A stove transforms electrical energy into thermal energy to cook food.

Front

What is an example of radiant energy use?

Back

Using a flashlight at night is an example of using radiant (light) energy.