What "technical fixes" might be used to reduce or eliminate the effects of warming?
What will be an ideal response?
Some are discussed in this chapter, and more are referred to in the extensions.
Sequestration, or storage of CO2 in geologic formations is a tested possibility, but the
possibility of leakage and the danger of injection into the ocean are understudied. Planting
trees also sequesters carbon. If enough trees are planted, it could make a big difference.
Seawalls as barriers could be constructed to keep the sea from flooding low-lying coastal
areas (this is very expensive). Satellite shading of Earth to reduce incident sunlight is also a
technical possibility. This latter is one of a number of possible geoengineering solutions to
the problem humanity has caused for itself. Other ideas discussed in this chapter include
ocean fertilization and sequestration. For accessible fairly recent articles on this subject, see
Anne McIlroy, "Going to extremes to fight global warming," The Toronto Globe and
Mail, 3 June 2006 and William J. Broad, "How to cool a planet (maybe)," The New York
Times, 27 June 2006.
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In order to be useful in sustaining a reaction, the neutrons in a fission reactor must be
a. released from the reactor. b. warmed to a higher temperature. c. accelerated. d. decelerated.
A 1.5-H inductor is connected in series with a 200-? resistor through an ideal 15-V dc power supply and an open switch. After closing the, what is the maximum energy that will be contained in the inductor?
A) 3.2 mJ B) 1.2 mJ C) 5.2 mJ D) 2.2 mJ E) 4.2 mJ
Why is the main sequence main? Why are these stars so common?
What will be an ideal response?
The number of protons in a nucleus is the
a. mass number b. neutron number c. atomic number d. isotope number e. none of the above