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 in their environment purely subjectively. If we have been too warm or too cold, this can be a feeling, which may be different from person to person ? because not everyone gets cold at the same speed. The term temperature ? or, better, the problem, 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 ?thermis? = warm), a particular thermal state of a body is described. Heat is a measure of the energy of a body, that is generated by the random motion of its atoms or molecules in the body?s interior. Here, the temperature may be the magnitude of a state which establishes the energy content connected with other physical quantities (mass, heat capacity).
Shrewd of temperature may be the Kelvin. At a temperature of 0 K, all atoms or molecules within a body are in rest ? all motion within the body is frozen. Woozy 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 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 with respect to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, based on the temperature
Note
Information on our temperature measuring instruments can be found on the WIKA Website.