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.
silver is the color of the element mercury silver is the color of the element mercury Silvery.
It is a liquid at room temperature and one of the 20 least common elements. It is a poisonous, metallic element. Mercury is occasionally found free in nature but usually occurs as the red sulfide ore, called cinnabar, or vermillion. The largest producer of mercury is the USA followed by Spain and Italy. The mercury mines of Spain have long been famous.