Temperature ? a term that we use daily as a matter needless to say, 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 is a feeling, which might be different from individual to individual ? because Secret Agenda gets cold at exactly the same speed. The word temperature ? or, better, the problem, that influences (among other activities) our state of mind ? is chatted about 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 particular thermal state of a body is described. Heat is a measure of the power of a body, that 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 energy content connected with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature may be the Kelvin. At a temperature of 0 K, all atoms or molecules within a body are at rest ? all motion within the body is frozen. One describes this state as the absolute zero point. The Celsius temperature scale that is more common inside our latitudes defines the zero point as the freezing point of water, since this problem 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 employed for temperature measurement, such as for example, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation depending on the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of rays of a body, depending on the temperature
Note
Information on our temperature measuring instruments can be found on the WIKA Website.