Question : Absolute zero is defined as:
Option 1: the temperature at which all molecular motion ceases.
Option 2: at which water boils at 298K.
Option 3: at which liquid helium boils.
Option 4: at which the volume becomes zero.
Correct Answer: the temperature at which all molecular motion ceases.
Solution : The correct option is the temperature at which all molecular motion ceases .
On the Kelvin scale, an absolute temperature scale, absolute zero is the lowest conceivable temperature. It is frequently represented by the abbreviation 0 K (zero Kelvin), and it is equal to around -273.15 0 C or -459.67 0 F. A substance's particles move very little thermally and have the lowest attainable levels of kinetic energy at absolute zero. A material potentially reaches this threshold when there is no more heat energy to lose, and all thermal activity stops.
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