Dew PointFor the following questions refer to the temperature and dew point data in the following cities:
CityAir Temperature (ºC)Dew Point (ºC)City A3524City B-12-12City C-1-6City D106Consider the situation where the air temperature in a room is 21ºC, the saturation vapour pressure is 25 hPa, the dew point temperature is 7ºC, and the actual vapour pressure is 10 hPa. Which of the following is the relative humidity?
A. near 40%
B. near 35%
C. near 20%
D. near 15%
Answer: A
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