physics_energy_2025_01_16_192613 Flashcards
Energy
Allows work to occur
Allows work to occur
Energy
System
An object or a group of objects
An object or a group of objects
System
Open system
Energy can be transferred into the surroundings
Energy can be transferred into the surroundings
Open system
Closed system
Energy cannot be transferred into the surroundings
Energy cannot be transferred into the surroundings
Closed system
Law of conservation of energy
Energy cannot be created or destroyed, only transferred between stores
Energy cannot be created or destroyed, only transferred between stores
Law of conservation of energy
Dissipation
Energy becoming spread out instead of in a concentrated store. Wasted energy
Energy becoming spread out instead of in a concentrated store. Wasted energy
Dissipation
Lubrication
A method of reducing unwanted energy transfers by application of a lubricant e.g oil to reduce friction. Occurs in machines
A method of reducing unwanted energy transfers by application of a lubricant e.g oil to reduce friction. Occurs in machines
Lubrication
Insulation
A method of reducing energy transfers by the use of insulators. Occurs in buildings
A method of reducing energy transfers by the use of insulators. Occurs in buildings
Insulation
Specific heat capacity
The energy needed to raise one kilogram of material by one degree celsius
The energy needed to raise one kilogram of material by one degree celsius
Specific heat capacity
Power
The rate of energy transfer. Measured in watts
The rate of energy transfer. Measured in watts
Power
Renewable resource
One that is, or can be, replenished as it is used
One that is, or can be, replenished as it is used
Renewable resource
Non-renewable resource
One that cannot be replenished as it is used, and therefore will run out
One that cannot be replenished as it is used, and therefore will run out
Non-renewable resource
