Homework 4, due Fri oct 22, 2010
			ENVR 30: Fall 2010

1. Reread Chap 2 (Red Queen) of Cadillac Desert and in outline form 
tell the story of William Mulholland, Fred Eaton, Otis Chandler, 
the Owens river, and how LA got its water.

2. The ocean currents are caused ultimately by
 a. coriolis force
 b. solar energy
 c. tidal motion
 d. migration of whales
 e. climate motion

3. During El Nino 
 a. the normal flow of pacific currents from east to west is partially reversed
 b. the height of the atlantic ocean increases
 c. the height of the atlantic decreases
 d. the normal flow of pacific currents from west to east is partially reversed
 e. none of the above

4. If California moves at 2 inches per year relative to the Pacific Plate,
how far will it have moved after 20 million years?

5. An earthquake that is 7.5 on the Richter scale is how much stronger than
	an earthquake that measures 5.5 on the Richter scale?
 a. 3 times stronger
 b. 10 times stronger
 c. 30 times stronger
 d. 100 times stronger
 e. 1000 times stronger

6. Name 3 things policy changes that might reduce the current rapid depletion 
  of resources.

7. Consider resource management under Net yield, MSY, and OSY ideologies.
 Which ideologies would give the smallest, medium, and largest harvest
 respectively of the resource in question?
 a. OSY, MSY, Net yield
 b. Net yield, OSY, MSY
 c. OSY, Net yield, MSY
 d. MSY, Net yield, OSY
 e. Net yield, MSY, OSY
 f. MSY, OSY, Net yield

8. Watch the 20 minute video, "The Story of Stuff" on
http://www.storyofstuff.com.  Write a very short review of this video.
You can mention things you liked or learned, things you thought were
exagerated, overdone, or misleading, etc.

9. List the following in order of amount to total energy available on Earth,
from most to least.  (Don't worry if you can't get them all correct)
a. Coal
b. Natural Gas
c. Solar
d. Wind
e. Tidal
f. geothermal
g. wood
h. oil 
i. Nuclear

10. A 1/2 kg object is thrown at a velocity of 12 m/s.  How much kinetic
energy does it have in Joules?  In Calories? In Btu? In kWh?
(You can either use the conversion factors listed in the lecture notes, or
  use Google calculator (type "1 Joule in Btu" into google;  watch out for 
  "calorie" vs. "Calorie" = 1000 calories; google probably doesn't know the difference)

11. One metric tonne (1000 kg) of water flows through a small hydroelectric
plant with a drop of 2 meters.
a.How much potential energy is released assuming 100% efficiency?
        in Joules? in Calories? in Btu? in kWh?
b. If the electricity generator is 90% efficient, then how much electricity
    if made in kWh.

12. An AAA battery contains about .0017 kWh.  How much is this in Calories?
        In Btu?  Which contains more energy a potato chip or an AAA battery?
        A match or an AAA battery?