Physics for IGCSE & O level - The Earth In Space (Section 2 - No. 25)
Which of the following is the best definition of "internal energy"?
The energy needed to raise the temperature
The sum of the kinetic and potential energies of all the particles
The energy of an object due to its motion
The energy stored within a chemical bond.
Explanation
Internal energy is the sum of kinetic and potential energies.
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