SHM, Waves, Thermo, E&M Practice Problem Workbook
SHM, Waves, Thermo, E&M Practice Problem Workbook
SHM, Waves, Thermo, E&M Practice Problem Workbook
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MECHANICS PRACTICE PROBLEM SETS 31<br />
9.2 HUMIDITY<br />
Below is the saturation curve for temperatures ranging from -30°C to 40°C. Use this<br />
information to solve the following problems. Do not write on the graph, you can use<br />
the saturation curve in your activity guide.<br />
Saturation Curve<br />
60<br />
Maximum Water Vapor (g/m 3 )<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
-40 -30 -20 -10 0 10 20 30 40 50<br />
Air Temperature (°C)<br />
1. Which contains more water vapor, air at 30°C with a relative humidity of 50% or air<br />
at 5°C that is saturated Answer: 30°C by about 7 g/m 3<br />
2. The air is currently at a temperature of 50°F and contains 4 g/m 3 of water vapor. Will<br />
the relative humidity be higher or lower if the temperature rises to 68°F and by what<br />
percent Answer: Lower by about 14%<br />
3. The air temperature outside is 60°F and it has a relative humidity of 70%. What is the<br />
dew point Answer: 9°C<br />
4. A parcel of air is 20°C and contains 7 g/m 3 of water vapor. What is the relative<br />
humidity of this parcel of air Answer: 40%<br />
a. The parcel of air rises into the atmosphere and cools at 7°C/km of altitude. At<br />
what altitude would condensation begin to occur Answer: 2.2 km<br />
Gamzon & Gregorian-Michaelsen 6/13/12
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