Energy-Paper 1
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What is a System
A group of objects
8 energy resources
Thermal Kinetic GPE Elastic Chemical Magnetic Electrostatic Nuclear
What is the conservation of energy
Energy can be transferred usefully, stored or dissipated but cannot be created or destroyed
What happens to wasted energy
The energy is dissipated
7 renewable energy sources
Wind Solar Tidal Hydroelectric Biofuel Geothermic Wave
4 Non renewable energy
Coal Gas Oil Nuclear
What is an renewable energy resource
A renewable energy source can be replenished
4 energy pathways
Mechanically Electrically Heating Radiation
Two ways to reduce energy waste
Lubrication Thermal insulation
What is thermal conductivity
How quickly heat can be transferred The higher the thermal conductivity of a material the higher the rate of energy transfer by conduction across the material
How the efficiency of a system can be increased
Insulation Lubricantion
What is specific heat capacity
The amount of energy to raise the temp of 1kg of a substance by one degree
What is power
Rate at which energy is transferred Rate at which work is Done
What is 1 watt
An energy transfer of 1 joule per second is equal of 1 watt