Which of the following statements accurately describes the distribution of cellular phones and televisions throughout the world?
What will be an ideal response?
Mauritania has more cellular phone subscribers per 1,000 than the United States, but fewer televisions per 1,000 people.
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Describe the changes in atmospheric stability throughout a 24-hour period beginning at sunrise on a cloudless summer day over land.
What will be an ideal response?
A projectile is fired horizontally in a region of no air resistance. The projectile maintains its horizontal component of speed because
A) it is not acted on by any forces. B) it is not acted on by any horizontal forces. C) it has no vertical component of speed to begin with. D) the net force acting on it is zero. E) none of the above
Surface waves are useful for investigating Earth's interior because they
A. reflect at the boundaries between Earth's layers. B. cast shadows indicating Earth's layers. C. refract at the boundaries between Earth's layers. D. none of the above
Famines can occur when overall levels of food availability are adequate
Indicate whether this statement is true or false