Temperature ? a term that we use daily as a matter of course, without being made aware of the physical correlations. But how may be Useless 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 person to person ? because not everyone gets cold at exactly the same speed. The word temperature ? or, better, the problem, that influences (among other things) 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 word 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, that is generated by the random motion of its atoms or molecules in the body?s interior. Here, the temperature is the magnitude of circumstances which establishes the energy content associated 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 within a body are at rest ? all motion in the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale that is more common inside our latitudes defines the zero point because the freezing point of water, since this problem could possibly be reproduced without great technical effort in past times.
Indecisive are directly influenced by the temperature and thus 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 with regards to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, with respect to the temperature
Note
Info on our temperature measuring instruments can be found on the WIKA Website.