The outside temperature 18 - 25 degrees C is saturated (Air at -25 degrees C holds a maximum of 0.0005 kg of moisture/kg of water). This air is drawn into the building and heated to 21 degrees C (air at 21 degrees C holds a maximum of 0.015 kg of moisture/kg of water). What is the relative humidity of the air inside?
a) 3.3%
b) 0.015%
c) 0.5%
d) 10.6%
e) 4.5%
Answer: A