Relative humidity. Relative humidity (RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest. It requires less water vapor to attain high relative humidity at low temperatures; more water vapour is required to attain high relative humidity in warm or hot air.
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Filed under: Mercury - 07 Jun 2013 | Spread the word ! Mercury is a natural occurring element. This element can be found in rocks, soil, water, but also in air and in living things. Mercury is a unique metal in the world, as it is liquid at room temperature. Mercury is odorless, but also colorless, at least in its pure form. Despite what you may imagine, mercury is an extremely dangerous metal for your health. This means that this is a hazardous chemical. Mercury exposure can actually lead to serious damage of the central nervous system, as well as the kidneys and liver.