Temperature ? a term that we use almost 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 are too warm or too cold, this is 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 condition, that influences (among other things) our state of mind ? is discussed daily when we are discussing the expected temperature from the weather forecast with friends, acquaintances or colleagues.
Temperature
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, 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 machine of temperature may be the Kelvin. At a temperature of 0 K, all atoms or molecules inside a body are at rest ? all motion within the body is frozen. Liberated describes this state because 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 condition could possibly 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 according to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, depending on temperature
Note
Home elevators our temperature measuring instruments can be found on the WIKA Website.