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1. Saturated (cloudy) air at a temperature of 20 °C (68 °F) has a relative humidity of _________%.

2. Compute the relative humidity (RH) to nearest percent for each of the following atmospheric conditions:
a. vapor pressure = 6 mb, saturation vapor pressure = 18 mb, RH = __________ %
b. mixing ratio = 4.5 g/kg, saturation mixing ratio = 9.0 g/kg, RH = __________ %
c. mixing ratio = 12.0 g/kg, saturation mixing ratio = 12.0 g/kg, RH = __________ %
3. Outdoors, the air temperature is 5 °C (44 °F) and the relative humidity is 70%. What is the relative humidity of the air if it is drawn indoors and heated to 20 °C (68 °F)? Assume that no water vapor is added to or removed from the air. (This is the situation with heating homes in the winter season.)
Answer: _______%
4. If the relative humidity is 68% and the vapor pressure is 16 mb, what is the vapor pressure at
saturation?
Answer: _________ mb
What is the approximate saturation air temperature? Answer: _________ °C.
5. On a clear and calm day, the air temperature at sunrise is 5 °C (41 °F) with a relative humidity of 90%. The air temperature reaches a maximum of 15 °C (59 °F) at 3 p.m. Assuming that no water vapor is added to or removed from the air, predict the value of the relative humidity at 3 p.m.
Answer: _____ %

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3 answers

  1. I took the test from a Meteorology class so here's the correct answers:
    1.) 100%
    2.) a. 25%
    b. 33%
    c. 100%
    3.) 17%
    4.) a. 24mb
    b. 20
    5.) 42%

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  2. 1.100
    2a.33
    2b.50
    2c.100
    3.60
    4a.24
    4b.12
    5.46

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  3. No one will do the work for you. You need to indicate your answers and a tutor will check the accuracy of them.

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