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P1 - Energy (Energy stores and systems (energy is always stored in one of…
P1 - Energy
Energy stores and systems
Energy is never used up. Instead it is just transered between energy stores and different objects
energy is always stored in one of these
energy stores
Chemicaal
magnetic
Elastic potential
Electrostatic
Gravitational potential
Nuclear
Kinetic
Thermal
Energy is transferred:
Electrical
Heating/radiation
Mechanical
When a system changes, energy is transferred
When a system changes, energy s transferred. It can be transferred:
Into the system
away from the system
into another system or object
Into a different energy store
closed systems
are where neither matter or energy can enter or leave.
net change
in the total energy of a closed system is always ZERO
System means singe object(air in a piston) or a group of objects (two colliding vehicles).
Energy can be transferred by heating
Wind solar and geothermal energy
Solar
Geothermal
Wind
Hydro-electric, tidal and wave power
tidal
wave
Hydro-electric
Kinetic and gravitational potential energy stores
Specific heat capacity
Conversion of energy and power
Reducing unwanted energy transfures
Efficiency
energy resources and their uses
Bio-fuels and non-renewable fuels
Trends in energy use