Changes in Energy

Energy transfer

Thermal energy

Solar power

$chemical \space (200J) \rightarrow heat \space (150J) + light \space (50J)$

$chemical \space (200J) \rightarrow heat \space (150J) \rightarrow light \space (50J)$

$gravitational \space (200J) \rightarrow kinetic \space (150J) + heat \space (50J)$

Microwave

Gas cooker

Kettle

It was wasted in the form of chemical energy in the water.

It was converted back to electrical energy within the kettle.

It was wasted in the form of heat energy to the surroundings.

The speed of the object increases as the height decreases.

The object's journey through the air will take the shape of a parabola.

The object is projected up and is pulled back down.

Yes

No

$kinetic \rightarrow heat + sound$

$kinetic \rightarrow elastic \space potential$

$kinetic \rightarrow heat + sound + kinetic$

It shows at a glance the amount of 'useful' and 'wasted' energy in a system.

It shows how to destroy unwanted types of energy and reduce 'wasted' energy.

It shows how to create different types of 'useful' energy.

The time taken for the energy transfer to take place

Input power

Input energy

The number of Joules of each type of energy

Whether the energy is 'useful' or 'wasted'

The different types of energies at each stage of the transfer