: the base unit of temperature in the International System of Units that is defined by setting the fixed numerical value of the Boltzmann constant to be 1.380649 x 10–23 joules per kelvin and that is equal to 1/273.16 of the Kelvin scale temperature of the triple point of water—abbreviation K
: relating to, conforming to, or having a thermometric scale on which the unit of measurement equals the Celsius degree and according to which absolute zero is 0 K, the equivalent of −273.15°C
Recent Examples on the Web
Back in 1998, though, astronomers saw a powerful flare erupt from Barnard’s star, causing its temperature to soar from about 3,100 kelvin to at least 8,000.—Amber Jorgenson, Discover Magazine, 14 Nov. 2018 Inside the sun, where nuclear fusion occurs, temperatures can swell to 15 million kelvin.—Jennifer Leman, Popular Mechanics, 22 Nov. 2022 About 5,000 light-years away, this star system is just 1 kelvin above absolute zero.—Stephen Ornes, Discover Magazine, 25 June 2019 At night, the surface of even the closest planet to the sun, Mercury, drops to about 95 kelvin.—Jennifer Leman, Popular Mechanics, 22 Nov. 2022 At night, the surface of even the closest planet to the sun, Mercury, drops to about 95 kelvin.—Jennifer Leman, Popular Mechanics, 22 Nov. 2022 The second challenge was to ensure the detectors worked properly by achieving a temperature of 7 kelvin (266º C below freezing).—Dhananjay Khadilkar, Ars Technica, 10 Aug. 2022 Lightforce takes special care to ensure its driving lights operate at 5,000 kelvin, which should be considered an ideal color temperature.—Wes Siler, Outside Online, 18 Aug. 2020 The color temperature of daylight varies with conditions but is commonly understood to range from 5,000 to 6,500 kelvin.—Wes Siler, Outside Online, 18 Aug. 2020 See More
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