In classical physics, zero absolute temperature means zero kinetic energy associated with random motion. The atoms in a substance do not move with respect to each other. The uncertainty principle in quantum mechanics requires that there is some zero-point energy. Absolute zero temperature is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach its minimum value, taken as 0. It is 0 K i.e. −273.15° C or −459.67° F. The temperature −273∘C is called absolute zero. The temperature scale with its zero at −273.15∘C and whose each degree is equal to one degree on the Celsius scale is the Kelvin or absolute scale of temperature. Absolute temperature is temperature measured using the Kelvin scale where zero is absolute zero. The zero point is the temperature at which particles of matter have their minimum motion and can become no colder.