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  2. Kelvin - Wikipedia

    en.wikipedia.org/wiki/Kelvin

    The kelvin (symbol: K) is the base unit for temperature in the International System of Units ... [52] to a high degree of precision. But before the redefinition, ...

  3. Thermodynamic temperature - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_temperature

    Thermodynamic temperature is a quantity defined in thermodynamics as distinct from kinetic theory or statistical mechanics.. Historically, thermodynamic temperature was defined by Lord Kelvin in terms of a macroscopic relation between thermodynamic work and heat transfer as defined in thermodynamics, but the kelvin was redefined by international agreement in 2019 in terms of phenomena that are ...

  4. Scale of temperature - Wikipedia

    en.wikipedia.org/wiki/Scale_of_temperature

    This means that a temperature difference of one degree Celsius and that of one kelvin are exactly the same. On 20 May 2019, the kelvin was redefined so that its value is now determined by the definition of the Boltzmann constant rather than being defined by the triple point of VSMOW. This means that the triple point is now a measured value, not ...

  5. Temperature - Wikipedia

    en.wikipedia.org/wiki/Temperature

    The kelvin is one of the seven base units in the International System of Units (SI). Absolute zero, i.e., zero kelvin or −273.15 °C, is the lowest point in the thermodynamic temperature scale. Experimentally, it can be approached very closely but not actually reached, as recognized in the third law of thermodynamics. It would be impossible ...

  6. Conversion of scales of temperature - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_scales_of...

    This is a collection of temperature conversion formulas and comparisons among eight different temperature scales, several of which have long been obsolete.. Temperatures on scales that either do not share a numeric zero or are nonlinearly related cannot correctly be mathematically equated (related using the symbol =), and thus temperatures on different scales are more correctly described as ...

  7. Negative temperature - Wikipedia

    en.wikipedia.org/wiki/Negative_temperature

    The absolute temperature (Kelvin) scale can be loosely interpreted as the average kinetic energy of the system's particles. The existence of negative temperature, let alone negative temperature representing "hotter" systems than positive temperature, would seem paradoxical in this interpretation.

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  9. Orders of magnitude (temperature) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    SI multiples of kelvin (K) Submultiples Multiples Value SI symbol Name Value SI symbol Name 10 −1 K dK decikelvin 10 1 K daK decakelvin 10 −2 K cK centikelvin 10 2 K hK hectokelvin 10 −3 K mK millikelvin 10 3 K kK kilokelvin 10 −6 K μK microkelvin 10 6 K MK megakelvin 10 −9 K nK nanokelvin 10 9 K GK gigakelvin 10 −12 K pK picokelvin