## Kelvin |

kelvin unit system si base unit unit of temperature symbol k named after william thomson, 1st baron kelvin the

**kelvin**is the ofbase unit in thetemperature (si), having the unit symbol k. it is named after the belfast-born,international system of units engineer and physicistglasgow university (1824–1907).william thomson, 1st baron kelvin the kelvin is now defined by fixing the numerical value of the

k to 1.380 649×10boltzmann constant ^{−23}j⋅k^{−1}. this unit is equal to kg⋅m^{2}⋅s^{−2}⋅k^{−1}, where the ,kilogram andmetre are defined in terms of thesecond , theplanck constant , and the duration of thespeed of light ground-statecaesium-133 .hyperfine transition ^{[1]}thus, this definition depends only on , and not on any physical artifacts as practiced previously, such as theuniversal constants , whose mass diverged over time from the original value.international prototype of the kilogram one kelvin is equal to a change in the

t that results in a change ofthermodynamic temperature kt by 1.380 649×10thermal energy ^{−23}j.^{[2]}the

**kelvin scale**fulfills thomson's requirements as anabsolute thermodynamic temperature . it usesscale as its null point.absolute zero unlike the degree

and degreefahrenheit , the kelvin is not referred to or written as acelsius . the kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the degree celsius, which has the same magnitude.degree - history
- usage conventions
- 2019 redefinition
- practical uses
- unicode character
- see also
- references
- external links

Kelvin | |
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Unit of | |

Symbol | K |

Named after |

The **kelvin** is the

The kelvin is now defined by fixing the numerical value of the ^{−23} J⋅K^{−1}. This unit is equal to kg⋅m^{2}⋅s^{−2}⋅K^{−1}, where the ^{[1]} Thus, this definition depends only on

One kelvin is equal to a change in the ^{−23} J.^{[2]}

The **Kelvin scale** fulfills Thomson's requirements as an

Unlike the degree