The Fahrenheit scale (named for Daniel Gabriel Fahrenheit) was used in the English system of measurement, until generally replaced by the Celsius (centigrade) scale.
Fahrenheit is still used in the US, but almost exclusively for:
- public weather statements (air temperatures and dew points)
- body temperatures
- oven temperatures
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The Fahrenheit scale is part of the English system of measurements for temperature.
The Rankine scale is used. On that scale, you use Fahrenheit-size degrees,
but the zero of the scale is at -459.67
Absolute : Kelvin in SI system & Rankine in English (aka Imperial) system
Ordinary : Celsius in SI system & Fahrenheit in English (aka Imperial) system
both Centigrade and Fahrenheit are used. But Fahrenheit was not used in schools since the mid '70s
The Rankine scale is used. On that scale, you use Fahrenheit-size degrees,
but the zero of the scale is at -459.67° F.
China primarily uses the Celsius temperature scale for weather forecasts and everyday temperature measurements. However, in some engineering and scientific applications, the Kelvin temperature scale is also used.
Celsius.
A primary scale is a scale that serves as the foundation or starting point for a particular measurement system. It is often used as a reference standard against which other measurements can be compared or calibrated.
Celsius is a metric measure used for temperature. It is a commonly used unit in the metric system to measure temperature, where water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.
Anders Celsius developed a scale for temperature measurement in 1742 that used the freezing and boiling points of water as its basis. This became know as both the Centigrade Scale and the Celsius Scale.