Temperature ? a term that people use almost daily as a matter needless to say, 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, this can be a feeling, which may be different from individual to individual ? because not everyone gets cold at exactly the same speed. The term temperature ? or, better, the problem, that influences (among other activities) 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 really 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, Dollar may be the magnitude of a state which establishes the power content connected with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature may be the Kelvin. At Menacing 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 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 dependent on the temperature and therefore are used for temperature measurement, such as, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation with regards to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of rays of a body, with respect to the temperature
Note
Information on our temperature measuring instruments can be found on the WIKA Website.