# Kelvin (K)

Kelvin (K) is the unit of measurement for temperature in the International System of Units (SI). It is named after the British scientist William Thomson, 1st Baron Kelvin (1824-1907).

The Kelvin scale is an absolute temperature scale; it is not relative to any other temperature scale. Zero on the Kelvin scale (0 K) is absolute zero, the lowest temperature possible.

Kelvin is often used in scientific research to express temperatures on a very precise scale. For example, the temperature of the sun's surface is approximately 5,778 K.

Is kelvin Big K or little K? The answer to this question depends on the context in which it is being asked. In general, kelvin (K) is considered to be the SI unit of temperature, and thus it is usually written with a capital letter (i.e. "Kelvin"). However, in some cases, such as when discussing the Planck constant (h), it is common to use a lowercase letter (i.e. "kelvin") to denote the unit. What is the meaning of 273. 15 K? The 273.15 K is the triple point of water. Is 0k absolute zero? No, 0k is not absolute zero. Absolute zero is the lowest possible temperature and is equal to -273.15 degrees Celsius.

### Why is the Kelvin scale used?

The Kelvin scale is used because it is an absolute temperature scale. This means that it is not affected by changes in pressure or humidity like the Celsius scale is. The Kelvin scale also has a smaller unit interval than the Celsius scale, making it more precise.

##### Why kelvin have no degree?

The Kelvin temperature scale is an absolute temperature scale that uses the SI unit of the kelvin. The kelvin is defined as the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. The triple point of water is the temperature and pressure at which water can exist in all three phases of solid, liquid, and gas.