Cyclonic airflow is characterized by:
A) convergence both at the surface and aloft. B) divergence both at the surface and aloft.
C) convergence aloft and divergence at the surface. D) divergence aloft and convergence at the surface.
D
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A rolling freight car collides with an identical freight car at rest. After coupling they roll with a speed of 2 m/s. From this information the initial speed of the lighter freight car was
A. 4 m/s. B. 8 m/s. C. 6 m/s. D. 5 m/s.
The property many metamorphic rocks exhibit by flat or elongated mineral grains in parallel layers is called
A) schist. B) cleavage. C) foliation. D) lithification.
Extratropical cyclones form between which two types of atmospheric cells?
A) Two Hadley cells B) A Hadley cell and a Ferrel cell C) A polar cell and a Hadley cell D) A polar cell and a Ferrel cell
People suffering from AIDS have a weakened immune system. Because of their disease, people who have AIDS are
A) more vulnerable to the risk of nitrogen in the air. B) less vulnerable to the risk of bacteria in the air. C) more vulnerable to bacteria that are less of a risk to healthy people. D) less vulnerable to any type of fungal, bacterial, or viral infection.