What is the metric absolute temperature at which all molecular motion is said to cease?

The metric absolute temperature at which all molecular motion is said to cease is 0 Kelvin (K). This temperature is also referred to as absolute zero, and it represents the theoretical point at which all thermal motion of particles reaches its minimum energy state.

In Kelvin, 0 K indicates an absence of thermal energy, meaning that the molecules would be in their lowest energy state, effectively ceasing all motion. This concept is fundamental in thermodynamics and establishes the baseline for the Kelvin scale, which is an absolute temperature scale used primarily in scientific contexts.

Other temperature scales, such as Celsius or Fahrenheit, can link to this concept, but they are relative rather than absolute. For example, -273.15 degrees Celsius is equivalent to 0 K, which fits into a broader understanding of thermodynamic principles but does not describe absolute zero in metric terms.