Photochemical smog is formed when primary pollutants interact with
a. Sunlight
b. water vapor
c. sulfur dioxide
d. Oxygen
e. Carbon
A
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What is the velocity of a stream with a cross sectional area of 300 m^2 and a discharge of 600 m^3/s?
A. 1 m/s B. 2 m/s C. 3 m/s D. 4 m/s
Answer the following statement(s) true (T) or false (F)
1. Despite independence of the colonies, both the United Kingdom and France remain very involved in their former empires. 2. The conflict in Northern Ireland arises from a combination of political and religious causes. 3. The modern country of Austria includes most of the German-speaking parts of the Hapsburg Empire. 4. The Swiss Confederation is composed of cantons that all look to a strong central government. 5. Western Europe has some of the highest population growth rates in the world.
The hygiene hypothesis predicts that the lowest levels of asthma should occur in people living in
A) poor rural families in developing countries. B) wealthy families in developing countries. C) poor urban families in developed countries. D) wealthy families in developed countries.
Streams generally receive their water from two sources. What are those two sources?
A) Lakes and meteorites B) Meteorites and comets C) Overland flow and groundwater D) Groundwater and evaporation