When a contracting hot ball of gas spins into a disk shape, it cools faster due to
A) increased convection currents.
B) increased radiation transfer.
C) decreased insulation.
D) increased surface area.
E) eddy currents.
D
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Which of the following is NOT a key issue at the center of the American immigration debate?
A) whether to build a fortified border wall along the Canadian border with the United States B) how to deal with the existing pool of undocumented people in the United States C) drug trafficking (and the associated violence with drug trafficking) along the U.S.-Mexico border D) whether to tighten the U.S.-Mexico border E) the number of legal immigrants who should be allowed on an annual basis
According to the textbook, Africans comprise about 14 percent of the world's population, but only consume ________ percent of the world's goods
A) 1 B) 2 C) 5 D) 8 E) 10
On a weather map, the transition zone between two air masses with sharply contrasting properties
is marked by: a. the letter "H." b. the words "air mass weather." c. a front. d. the letter "L."
Though Earth is 4.6 billion years old, the oldest seafloor is no more than 280 million years old
Indicate whether the statement is true or false