Kelvin
| kelvin | |
|---|---|
 | |
| General information | |
| Unit system | SI |
| Unit of | temperature |
| Symbol | K |
| Named after | William Thomson, 1st Baron Kelvin |
| 2019 definition | kB ≝ 1.380649×10−23 J/K |
| Conversions | |
| 273.15 K in ... | ... corresponds to ... |
| Celsius | 0 °C |
| Fahrenheit | 32 °F |
| Rankine scale | 491.67 °Ra |
Kelvin, garmii ke naap ke unit hae. Ii saat base units me International System of Units (SI) se ek hae au iske symbol K hae. Kelvin scale ek absolute garmii ke naape waala scale hae jon sab se kamtii temperature hoe sake hae (absolute zero), jiske 0 K maana jaawe hae. Definition ke anusaar, Celsius scale (symbol °C) aur Kelvin scale ke ekke magnitude hae (jiske matlab hae ki, garmii keek kelvin se barrnaa aur 1 °C ke barrai, duuno 1 K ke baraaba r hae), aur koi temperature degrees Celsius me ke kelvin scale me badlaa jaawe sake hae, 273.15 jorr ke.
19th-century ke British vigyanik, Lord Kelvin sab se pahile ii scale ke develop aur propose karis rahaa. Iske dher dafe "absolute Celsius" scale bola jaawat rahaa, 20th century ke suruwaat me. Kelvin ke formally International System of Units me 1954 me jorraa gais rahaa, jon define karat rahaa 273.16 K ke paani ke triple point ke temperature (0.01 °C). Celsius, Fahrenheit, aur Rankine scales ke fir se define karaa gais rahaa Kelvin scale ke terms me ii definition ke kaam me laae ke. 2019 revision of the SI abhi now define kare hae kelvin ke energy se Boltzmann constant ke set kar ke; har ek 1 K thermodynamic temperature ke badlao thermal energy ke badlao ke baraabar hae, kBT, of exactly joules.