Temperature ? a term that we use almost daily as a matter of course, without being made alert to 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, it is just a feeling, which may be different from individual to individual ? because not everyone gets cold at exactly the same speed. The word temperature ? or, better, the problem, that influences (among other activities) our mind-set ? 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 particular thermal state of a body is described. Heat is really a measure of the power of a body, which 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 power content connected with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature may be the Kelvin. At Luxury of 0 K, all atoms or molecules inside a body are at rest ? all motion within the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale which 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 influenced by 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 based on the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of rays of a body, with regards to the temperature
Note
Home elevators our temperature measuring instruments can be found on the WIKA Website.