Energy transfers

Different forms of energy can be transferred from one form to another.

Energy transfer diagrams show each form of energy - whether it is stored or not - and the processes taking place as energy is transfer.

The energy transfer diagram below shows the useful energy transfer in a car engine.

You can see that a car engine transfers chemical energy, which is stored in the fuel, into kinetic energy in the engine and wheels.

Energy is input into a car engine in the form of chemical energy in the fuel. The energy is output in the form of kinetic energy in the engine and wheels.Process of using chemical energy

This diagram shows the energy transfer for the useful energy transfer in an electric lamp.

You can see that the electric lamp transfers or converts electrical energy into light energy.

Energy is input into an electric lamp in the form of electrical energy. The energy is output in the form of light energy.Process of using electrical energy

Note that these energy transfer diagrams only show the useful energy transfers.

However, car engines are also noisy and hot, and electric lamps also give out heat energy.