Electromagnetic and mechanical waves both transfer energy. how is an electromagnetic wave different from a mechanical wave?

an electromagnetic wave has frequency, and a mechanical wave does not.

an electromagnetic wave is made of atoms, and a mechanical wave is not.

an electromagnetic wave can travel in a vacuum, and a mechanical wave cannot.

electromagnetic waves have frequencies that never change, and mechanical wave frequencies change.

An electromagnetic wave can travel in a vacuum, and a mechanical wave cannot.

Explanation: Electromagnetic waves are waves which can travel through the vacuum. electromagnetic waves have electrical and magnetic component associated with them. They all travel with the speed of light.The energy transport through a medium involves the absorption and re emission of the wave energy by the atoms of the material.

Mechanical waves require a medium to travel so that they can transport their energy from one location to another.

Sound waves are examples of mechanical waves while light waves are examples of electromagnetic waves.