Homework for Chapter 2 - Energy: Warming the Earth and the Atmosphere

SHOW ALL WORK , CIRCLE THE CORRECT ANSWER, PLEASE BE NEAT AND STAPLE YOUR HOMEWORK!

ALSO, PLEASE USE A SPREADSHEET FOR ALL GRAPHS

Follow the Problem solving steps discussed in class

1.  Let's say that you have 5 kg of air.  Within that 5 kg of air, there are 10 grams of vapor that condense into water.

a.  As the vapor condenses into water, is heat released or added?  How much?

b.  How will the temperature of the air change?  Assume that your answer in (b) either cools or warms the 5 kg of air.

2.  Consider an area of sand that has a temperature of 35 degrees Celsius.

a.  How much radiation is it emitting assuming the sand is a black body?

b.  At what wavelength is maximum emission occurring?

c.  Assume the area of sand is 50 m2 and a nearby area of grass at a temperature of 30 degrees Celsius has an area of 100 m2.  Which surface is emitting the most radiation?

3     a. In a hurricane, if 100 grams of water vapor condense into water every second, how many calories of heat are released into the atmosphere in one day? How much additional heat per day would be released if the water then froze into ice particles?

b. If the mass of a dry air parcel in a thunderstorm is 50 kg, how much cooler will the parcel be if 40 grams of ice sublimates into water vapor within the parcel?

4. How is heat transferred away from the surface of the moon? The moon has no atmosphere.

5. What are the fundamental points discussed in class for all material beginning with: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter2/hcap_spec.html and ending at: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter2/plank_e_sun.html ?

Extra Credit:  Consider a snow-covered surface.  Assume that the amount of solar radiation that reaches the top of the atmosphere is 1367 Wm-2.  Given that 50% of this solar radiation is either absorbed in the atmosphere or reflected by clouds before reaching the the snow covered surface, how much of the original shortwave radiation is absorbed by the snow?