Favorite movie(s) adapted from Young Adult books? Happy Easter! What movie did a bad review save you from seeing in 2013?
Humidity is the amount of water vapor in the air. Too much or too little humidity can be dangerous. For example, high humidity combined with hot temperatures is a combination that can be a health risk, especially for the very young and the very old. Humidity plays an important role in our daily weather.
1 Relative humidity (RH) is the ratio of the mole fraction of water vapor to the mole fraction of saturated moist air at the same temperature and pressure. 2  RH is dimensionless, and is usually expressed as a percentage.pecific humidity is defined as the proportion of the mass of water vapor per unit mass of the moist air sample (dry air plus the water vapor); it is closely related to humidity ratio and always lower in value.