What is the lowest possible temperature on the Kelvin scale?

The lowest possible temperature on the Kelvin scale is 0 K, which is known as absolute zero. At this temperature, all molecular motion ceases, and a system reaches its minimum possible energy state. The concept of absolute zero is fundamental in thermodynamics and physical sciences, as it serves as a baseline for temperature measurements.

On the Kelvin scale, temperatures are expressed as positive values starting from absolute zero, which is equivalent to -273.15 degrees Celsius. Since 0 K represents this absolute minimum, it is the lowest value possible, as negative values do not exist on this scale.

Understanding this foundational principle is essential, especially in fields such as power engineering, where temperature plays a critical role in various processes and calculations.