Internal energy
What Internal energy means in Physics A-Level, as defined for AQA, OCR.
Definitions of Internal energy
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Reference: OCR
The sum of the random distribution of kinetic and potential energies associated with the molecules of a system.
The sum of the randomly distributed kinetic energies and potential energies of the particles in a body.
The sum of the random kinetic and potential energies of the particles of a substance.
The sum of the random kinetic and potential energies of the particles of a body.
Topics that use Internal energy
- Thermal energy transfer (A-level only) (AQA A-Level)
- Solid, liquid and gas (OCR A-Level)
Related terms
- Specific heat capacity
- Absolute zero
- Brownian motion
- Change of phase
- Change of state
- Conservation of energy
- Constant temperature during phase change
- Energy transfer by heating and work
Using Internal energy in the exam
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