| Temperature |
| The temperature is a measure of the heat energy present in a substance, be it solid, liquid or gaseous.The heat, in turn, is energy that manifests as molecular vibration of a substance or as electromagnetic radiation. In simple terms we can say that heat is the phenomenon, while the temperature is a way to measure it.According to the International System of Units temperature is measured in kelvin (K), although in science and meteorology is common to use the degree Celsius (° C). As units of measurement are equivalent, but differ in their respective scales. The Kelvin scale is used to establish the absolute temperature, and therefore begins at absolute zero, which represents the point at which the atoms and molecules of a substance having the least amount of thermal energy. The value 0 of the Celsius scale, on the other hand, corresponds approximately to the freezing temperature of water (when it is subjected to a pressure of 1 atmosphere), which occurs at 273.15 K. Stated conversely, the zero all of the kelvin scale is equivalent to -273.15 ° C. Often colloquially degrees Celsius degrees Celsius are denominated, although this term is not considered appropriate in science to indicate temperature values (this is to avoid confusion with the Celsius, or grad, used as angular measure ).
In some countries it is used the degree Fahrenheit (° F) instead of Celsius, and temperature measurement.The fundamental difference between the two measures is the way your scale is defined. While the values 0 and 100 ° C correspond roughly to temperatures of freezing and boiling water, the values 0 and 100 ° F are derived from the temperatures of freezing and boiling a mixture of ammonium chloride and water.The equivalence between the two measures can be set using the following formulas: Temp. ° C = (° F Temp. – 32) * 1 / 1.8 Temperature is perhaps the most important environmental factor, given his enormous influence on the feeling of comfort of humans. Although when speaking of temperature as an environmental factor first thing that comes to mind is the air temperature, we must speak at least four “types” of temperature are of great importance in the field of meteorology and / or in the thermal analysis of buildings: dry bulb, wet bulb, mean radiant and operative. |
