Failure ? a term that people use 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, it is just a feeling, which may be different from individual to individual ? because not everyone gets cold at exactly the same speed. The word temperature ? or, better, the problem, that influences (among other things) our mind-set ? is chatted about daily whenever we are discussing the expected temperature from the elements forecast with friends, acquaintances or colleagues.
Temperature
With the term temperature (from the Greek ?thermis? = warm), a particular thermal state of a body is described. Heat is really a measure of the power of a body, that is generated by the random motion of its atoms or molecules in the body?s interior. Here, the temperature is the magnitude of a state which establishes the energy content associated 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 within a body are at rest ? all motion within the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale which is more common inside our latitudes defines the zero point because the freezing point of water, since this problem could be reproduced without great technical effort in past times.
Temperature measurement
Different physical properties are directly influenced by the temperature and thus are employed for temperature measurement, such as for example, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation according to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, based on the temperature
Note
Info on our temperature measuring instruments are available on the WIKA Website.