Energy Stores and Transfers

Flashcards covering key terms and definitions related to energy stores and transfers.

Conservation

The principle that energy cannot be created or destroyed, only transferred.

Efficiency

The percentage of input energy that is converted into useful output energy.

Energy Store

A place where energy is held in a particular form.

Energy Transfer

The process of moving energy from one store to another.

Gravitational Potential Energy (GPE)

Energy stored in an object as a result of its height above the ground.

Joule (J)

The unit of measurement for energy.

Kinetic Energy

Energy possessed by an object due to its motion.

Mass

The quantity of matter in an object, measured in kilograms (kg).

Sankey Diagram

A visual representation that shows the distribution of energy input as useful and wasted energy.

Thermal Energy

Energy related to the temperature of an object, often referred to as heat energy.

Mechanical Transfer

Energy transfer that occurs when a force is applied to move an object.

Electrical Transfer

Energy transfer associated with moving electrical charges through a conductor.

Heating

Energy transfer from a hotter object to a cooler one.

Radiation

Energy transfer through electromagnetic waves or sound waves.

Efficiency Formula

Efficiency = (Useful energy output / Total energy input) x 100%.