A parcel of air at 25°C is completely saturated with a vapor pressure of 30 mb. Cloud formation removes water vapor from the atmosphere resulting in a new vapor pressure of 15 mb at the same temperature of 25°C. What is the relative humidity of the parcel of air at 25°C and 15 mb?





A) 15 mb

B) 50%

C) 50 mb

D) 15%




B) 50%

Environmental & Atmospheric Sciences

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