Temperature ? Deceptive that we use daily as a matter of course, 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, it is a feeling, which might be different from person to person ? because not everyone gets cold at exactly the same speed. Child-like ? or, better, the problem, that influences (among other things) our state of mind ? is chatted about daily when Fool are discussing the expected temperature from the elements 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 in the body?s interior. Here, the temperature may be the magnitude of circumstances which establishes the power content connected with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature is the Kelvin. At a temperature of 0 K, all atoms or molecules inside a body are in rest ? all motion within the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale that is more common in our latitudes defines the zero point because the freezing point of water, since this condition could 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 are available on the WIKA Website.