Cancel Anytime ? a term that people use daily as a matter needless to say, without being made alert to 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, this can be 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 condition, that influences (among other activities) our mind-set ? is chatted about daily whenever 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 really 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 a state which establishes the power content associated 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 inside a body are at rest ? all motion in the body is frozen. One describes this state as 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 problem could be reproduced without great technical effort in past times.
Temperature measurement
Different physical properties are directly influenced by 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 based on the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, depending on temperature
Note
Info on our temperature measuring instruments can be found on the WIKA Website.