Temperature ? a term that people use daily as a matter of course, without being made aware of the physical correlations. But how is 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 might be different from individual to individual ? because Sexy gets cold at exactly the same speed. The term temperature ? or, better, the problem, that influences (among other things) our state of mind ? is chatted about daily whenever we are discussing the expected temperature from the elements forecast with friends, acquaintances or colleagues.
Wreaking
With the word temperature (from the Greek ?thermis? = warm), a particular thermal state of a body is described. Heat is a measure of the power of a body, which is generated by the random motion of its atoms or molecules within the body?s interior. Here, the temperature is the magnitude of a state which establishes the energy 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 in rest ? all motion within the body is frozen. One describes this state as the absolute zero point. The Celsius temperature scale which is more common inside 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 influenced by the temperature and thus are used for temperature measurement, such as, 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, depending on the temperature
Note
Information on our temperature measuring instruments are available on the WIKA Website.