Reducing unwanted energy transfers (Edexcel GCSE Physics): Flashcards
📚Flashcards
Practise the cards
12 cards from this deck
ShowHide
Practise the cards
12 cards from this deck
Efficiency limit of devices
Efficiency limit of devices
No device is 100% efficient
What lubrication does to friction
What lubrication does to friction
Reduces it between moving parts
Energy store friction transfers to
Energy store friction transfers to
Thermal energy store
State of most lubricants
State of most lubricants
Liquids
Example of lubrication in vehicles
Example of lubrication in vehicles
Oil in car engine reduces friction
What thermal insulation reduces
What thermal insulation reduces
Rate of heat energy transfer
Process where heated particles vibrate & transfer energy
Process where heated particles vibrate & transfer energy
Conduction
Property of insulation materials
Property of insulation materials
Low thermal conductivity
Effect of lower thermal conductivity
Effect of lower thermal conductivity
Slower heat transfer
Effect of reducing wasted energy
Effect of reducing wasted energy
Increases efficiency
Two ways to reduce unwanted energy transfers
Two ways to reduce unwanted energy transfers
Lubrication and thermal insulation
Why lubricants reduce friction effectively
Why lubricants reduce friction effectively
Flow between objects and coat them