kelvinejä

Kelvinejä is a Finnish term that translates to "Kelvin" in English, referring to the SI base unit of thermodynamic temperature. It is named after the physicist William Thomson, 1st Baron Kelvin. The Kelvin scale is an absolute temperature scale, meaning that 0 Kelvin represents absolute zero, the theoretical point at which particles have minimal motion. This is in contrast to Celsius and Fahrenheit, which have arbitrary zero points.

The kelvin is defined by setting the fixed numerical value of the Boltzmann constant, k, to 1.380649 × 10⁻²³ J⋅K⁻¹, when expressed in the unit J⋅K⁻¹, which is equal to kg⋅m²⋅s⁻²⋅K⁻¹. This definition ensures that the kelvin is an SI base unit. The kelvin is used widely in scientific research and technical applications due to its absolute nature. It is crucial for fields such as thermodynamics, statistical mechanics, and atmospheric science.

The conversion between Kelvin and Celsius is straightforward. To convert from Celsius to Kelvin, one simply adds 273.15. For example, 0 degrees Celsius is equal to 273.15 Kelvin. Conversely, to convert from Kelvin to Celsius, one subtracts 273.15 from the Kelvin value. While the kelvin is the standard unit for scientific temperature measurements, Celsius remains more commonly used in everyday life in many parts of the world.