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Physics Revision - Changes in energy stores - Coggle Diagram
Physics Revision - Changes in energy stores
Elastic Potential
The energy stored when an object is stretched or squashed.
Examples - Drawn catapults, compressed springs, inflated balloons
Energy (J) = 1/2 x Spring constant (N/m) x Extension (m) squared
Kinetic
The energy of a moving object.
Examples - Runners, buses, comets
Energy (J) = 1/2 x mass (kg) x velocity squared
Nuclear
The energy stored in the nucleus of an atom.
Examples - Uranium nuclear power, nuclear reactors
Thermal
The total kinetic and potential energy of the particles in an object. In hotter objects, the particles have more internal energy and vibrate faster.
Examples - Human bodies, hot coffees, stoves or hobs.
Energy (J) = mass (kg) x specific heat capacity x change in temperature
Gravitational Potential
The energy of an object at a height.
Examples - Aeroplanes, kites, mugs on a table
Energy (J) = mass (kg) x gravitational field strength (N/kg) x height (m)
Chemical
The energy stored in chemical bonds, such as those between molecules.
Examples - Food, Muscles, Electrical cells
Energy Transfers
Systems and stores - Energy can remain in the same store for millions of years or sometimes just for a fraction of a second. Whenever a system changes, there is a change in the way some or all of the energy is stored.
Transferring Energy
Mechanical work - a force moving an object through a distance
Electrical work - Charges moving due to a potential difference
Heating - due to temperature difference caused electrically or by chemical reaction
Radiation - energy transferred as a wave, eg light and infrared