Chapter 1: Energy Stores And System Flashcards
Transferring and storing
When transferring energy is not lost
It is conserved
Energy cannot be destroyed or created
Can be transferred from one store to another
Energy
Energy is the ability to do work
System
Is an object or groups of objects
Changes
There are charges in the way energy is stored when a system changes
E.g. Bringing water to boil in a electric kettle
Storing energy
Energy can be stored in a variety of different energy stores
Transferring energy to an object
When energy is transferred to an object to an object
The energy is stored in one of the objects energy stores
Transferring mechanically
Energy is transferred mechanically a force doing work electrically (a work done by moving charges ) by heating or by radiation
E.g.light and sound
Storing - Thermal energy
Anything with a temperature above absolute zero (-273 degrees Celsius) has thermal energy
Everything has thermal energy
The hotter something is the more heat energy it has
Kinetic energy
Anything that moves has kinetic energy
Nuclear energy
Released only from nuclear reactions
E.g. The sun and all the stars
Hydrogen bomb (fusion)
Nuclear power plants and the atomic bomb (fission)
Chemical energy
Anything with stored energy which can be released by a chemical reaction has chemical energy
Things like food, fuels and batteries
Gravitational potential energy
Anything above the ground has GPE i.e anything can fall
Ski jumpers, aeroplanes and climbers
Elastic potential energy
Anything stretched has elastic energy-things like: Rubber bands Springs Elastic Etc
Transfers - light energy
Anything luminous gives off light energy: such as- The sun Light bulbs Candles Glow worms
Electrical energy
Is very useful because it is easily converted into other forms
Wherever there is a current flowing, there is electrical energy
