When a liquid is cooled, the kinetic energy of the particles decreases. The force of attraction between the particles increases, the space between the particles decreases and the matter changes its state to solid.
Kinetic energy can simply be defined as the energy a body possessed due to its relative motion.
So therefore, when a liquid is cooled, the kinetic energy of the particles decreases. The force of attraction between the particles increases, the space between the particles decreases and the matter changes its state to solid..
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