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‘The relative humidity (Φ) of an air-water mixture is defined as the ratio of the partial pressure of water vapor (H2O) (eω) in the mixture to the equilibrium vapor pressure of water (e*ω) at a given temperature.Relative humidity is normally expressed as a percentage and is calculated by using the following equation:
Φ= eω/e*ω
The higher the percentage, the more humid. The higher the relative humidity, the less drying takes place. This affects the human bodies' perception of heat, as explained next.’ [3]
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