Temperature ? a term that we 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 within their environment purely subjectively. If we have been too warm or too cold, this can be a feeling, which may be different from individual to individual ? because not everyone gets cold at the same speed. The word temperature ? or, better, the problem, that influences (among other things) our state of mind ? is chatted about daily when we are discussing the expected temperature from the elements forecast with friends, acquaintances or colleagues.
Capable
With the term temperature (from the Greek ?thermis? = warm), a specific thermal state of a body is described. Heat is a measure of the power of a body, that is generated by the random motion of its atoms or molecules within the body?s interior. Here, the temperature may be the magnitude of circumstances which establishes the power 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 inside a body are in rest ? all motion in the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale which is more common in our latitudes defines the zero point because the freezing point of water, since this condition could possibly 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:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation depending 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.