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Mechanical Properties Of Fluids

Question
CBSEENPH11019666

Define relative humidity in terms of pressure.

Solution
Relative humidity is defined as the ratio of vapour pressure (p) actually present in the air at room temperature to the saturated vapour pressure (P) at same temperature.
Mathematically, the formula is given by, 
                  bold space bold space
bold space bold space bold space bold space bold space space straight R. straight H. equals straight P subscript actual over straight P subscript saturated