On account of levels of rakish bend, the degree image follows the number with no space in the middle, for instance 30 °. The addition of minutes and seconds of arc units follows the units of degree, with spaces between the units but no spaces between the numbers and arc symbols, for example, 30 ° 12 ′ 5 ″.
For temperature degrees, three engineering and scientific standards bodies (the International Bureau of Weights and Measures, the International Organization for Standardization, and the United States Government Printing Office) prescribe printing temperatures with a space between the number and the degree symbol, for example 10 ° C. However, in many works with professional typesetting, including scientific papers published by the University of Chicago Press or Oxford University Press, the degree symbol is printed without spaces between the number, the symbol and the Latin letters “C” or “F” representing Celsius or Fahrenheit, respectively, p. ex. 10 ° C. This is also the practice of the University Corporation for Atmospheric Research,
Although not recommended, the degree symbol without the next Latin letter is used without a space between the number and the symbol, for example, 10 °; this is considered more acceptable if the temperature standard is not known, but it is recommended in this case that the entire word (eg 10 degrees) be used instead of the symbol. The use of the degree symbol to refer to temperatures measured in degrees Kelvin (symbol: K) was abolished in 1967 by the 13th General Conference on Weights and Measures (CGPM). Therefore, the triple point of water, for example, is simply written as 273.16 K. The name of the SI unit of temperature is now “kelvin”, in lower case, and no longer “degrees Kelvin”.
Physical quantity that indicates the ability of a body to transfer or absorb heat from the environment or from another body in contact with it. In practice, a body’s temperature measurement represents an indication of “how hot or cold” the body is. The instruments used to carry out temperature measurements are thermometers, based on different properties of certain substances (thermal expansion or thermoelectric effect) to give a value of said magnitude in relation to the conventionally established scale.
The most widely used unit of measure is the degree centigrade (symbol ° C), which corresponds to one hundredth of the temperature interval between the melting and boiling points of distilled water at 1 atm, which adopt conventional and respectively the values of 0 ° C and 100 ° C. This temperature scale is also called the Celsius scale. Another scale, used in Anglo-Saxon countries, is Fahrenheit (symbol ° P), according to which 0 and 100 of the Celsius scale correspond, respectively, to 32 and 212 ° P. The scale is obtained by matching the indication of 100 ° F to the temperature of the human body (36 ° C). The Réaumur scale (symbol ° R) has also been used, in which 0 and 100 ° C correspond respectively to 0 and 80 ° R.
In thermodynamics, temperature is usually measured in ° C, referring it, however, to the so-called absolute scale or Kelvin (symbol ° K). The temperature in degrees Kelvin corresponds to the temperature, in degrees Celsius, measured with respect to absolute zero (-273.16 ° C). Between the Celsius scale and the absolute scale there is thus the relationship r (° K) = É (° C) + 273.16.
Measuring the temperature
Now that you know the difference between heat and temperature and their relationship, we are going to know which are the most used scales to measure temperature.
When you have suspected a fever, you have most likely measured your temperature with a thermometer . Thermometers are used to measure temperature according to well-defined measurement scales.
The three most common temperature scales are: Celsius, Fahrenheit, and Kelvin. A temperature scale can be made by distinguishing two effectively reproducible temperatures. The boiling temperatures (change from liquid to vapor state) and melting (change from solid to liquid state) of water, at one atmosphere of pressure, are examples of parameters used.
Celsius and Fahrenheit
Although most countries use the Celsius or Centigrade scale, some use the Fahrenheit scale, so it is good to know them and know how their units can be converted, in order to understand each other.
The Celsius scale (\ degree C° Cdegree, C) takes into account the value 0 \ degree0 °0, degree for the melting point of water, while the boiling point of water corresponds to 100 \ degree1 0 0 °100 degree.
In the case of the Fahrenheit scale (\ degree F)° F )degree, F, right parenthesis, the most used in the United States for example, the melting point of water is at 32 \ degree3 2 °32, degreeFFF and boiling at 212 \ degree2 1 2 °212, degreeFFF.
It is very important to remember that the variation in temperature of one degree Celsius is greater than the variation in temperature of one degree Fahrenheit. Only100 \ degree1 0 0 °100 degree CCC cover the same range as 180 \ degree1 8 0 °180 degree FFF.