Why is conduction the dominant form of heat transfer within the lithosphere?
What will be an ideal response?
Lithospheric convection cannot work because of the very high viscosity of the materials, whereas the lower viscosity in the mantle and the huge mass permits slow mantle convection.
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The least amount of energy needed to produce forced vibrations in an object occurs
A. at its natural frequency. B. below its natural frequency. C. above its natural frequency. D. none of the above
Regional large scale storms where winds converge on areas of low pressure are
A) tornados. B) fronts. C) cyclones. D) hurricanes.
Since the 1970s, the overall trend in emissions of primary pollutants in the United States has ____
A) increased B) varied C) remained the same D) declined
World cities are most closely integrated into the global economic system because they
A) are at the center of the flow of information and capital. B) control the flow of labor and technology. C) contribute money to local, regional and national candidates for elective officers. D) are at the heart of the supply chain and make sure goods move freely. E) are integral to the functioning of democracy.