# Determine the relative humidity of the air if, at a temperature of +10 ° C, 1 m1 of this air contains 1 g of water vapor Relative air humidity φ is equal to the ratio of absolute air humidity ρ and saturated vapor density ρо (at the same temperature). That is, it is determined by the formula: φ = ρ / ρо. From the conditions of the task it is known that 1 m³ of atmospheric air contains 1 g of water vapor at a temperature of + 10 ° C, which means ρ = 1 g / m³. From the reference tables we find that the density of saturated steam at a temperature of + 10 ° C is equal to ρо = 9.4 g / m³, respectively. We substitute the found values ​​of physical quantities into the formula and perform the calculations, we obtain the relative humidity of the air φ = 1 / 9.4 ≈ 0.106 = 10.6%.
Answer: the relative humidity of this air is 10.6%. Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.