Temperature ? a term that we use daily as a matter of course, without being made aware of 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 is a feeling, which might be different from individual to individual ? because not everyone gets cold at the same speed. The term temperature ? or, better, the problem, that influences (among other things) our mind-set ? is chatted about daily when we are discussing the expected temperature from the elements forecast with friends, acquaintances or colleagues.
Temperature
With the word temperature (from the Greek ?thermis? = warm), a specific thermal state of a body is described. Heat is really a measure of the energy of a body, which is generated by the random motion of its atoms or molecules within the body?s interior. Here, the temperature may be the magnitude of a state which establishes the power content associated with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature is the Kelvin. At Delighted of 0 K, all atoms or molecules inside a body are in rest ? all motion in the body is frozen. The Truth describes this state as the absolute zero point. The Celsius temperature scale which is more common in our latitudes defines the zero point as 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 dependent on the temperature and therefore 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 temperature
temperature-dependent frequency fluctuations
changes in the wavelength of rays of a body, depending on temperature
Note
Information on our temperature measuring instruments can be found on the WIKA Website.