Conservation of Energy (AQA GCSE Physics): Flashcards
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15 cards from this deck
Conservation of energy principle
Conservation of energy principle
Energy cannot be created or destroyed
3 ways energy can be handled
3 ways energy can be handled
Transferred, stored, dissipated
Net energy change in closed system
Net energy change in closed system
Always zero
Useful energy definition
Useful energy definition
Energy transferred to desired store
Wasted energy definition
Wasted energy definition
Energy ending up in other stores
Term for wasted energy
Term for wasted energy
Dissipated
Light bulb: useful energy
Light bulb: useful energy
Light
Light bulb: wasted energy
Light bulb: wasted energy
Heat
Useful + wasted energy equals
Useful + wasted energy equals
Energy input
2 methods to minimise energy loss
2 methods to minimise energy loss
Thermal insulation & lubrication
Purpose of thermal insulation
Purpose of thermal insulation
Slows rate of heat loss
Purpose of lubrication
Purpose of lubrication
Reduces friction
Thermal conductivity definition
Thermal conductivity definition
How well material transfers heat
Low thermal conductivity materials
Low thermal conductivity materials
Good insulators
High thermal conductivity materials
High thermal conductivity materials
Poor insulators