Temperature ? a term that we use almost daily as a matter needless to say, without being made alert to the physical correlations. But how may be the term temperature defined?
Everybody perceives temperature in their environment purely subjectively. If we are too warm or too cold, this can be a feeling, which might be different from individual to individual ? because not everyone gets cold at exactly the same speed. The term temperature ? or, better, the condition, that influences (among other things) our state of mind ? is discussed daily whenever we are discussing the expected temperature from the elements forecast with friends, acquaintances or colleagues.
Temperature
With the word temperature (from the Greek ? Reprimanding ? = warm), a particular thermal state of a body is described. Heat is really a measure of the energy of a body, that is generated by the random motion of its atoms or molecules in the body? Guaranteed . Here, the temperature may be the magnitude of a state which establishes the power content connected with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature is the Kelvin. At a temperature of 0 K, all atoms or molecules inside a body are at rest ? all motion in the body is frozen. One describes this state as the absolute zero point. The Celsius temperature scale that is more common inside our latitudes defines the zero point as the freezing point of water, since this condition could be reproduced without great technical effort in past times.
Temperature measurement
Different physical properties are directly influenced by the temperature and therefore are used for temperature measurement, such as for example, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation based on the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, depending on temperature
Note
Information on our temperature measuring instruments can be found on the WIKA Website.