Which have the longest wavelengths when traveling in a vacuum?
A. X-rays.
B. Light.
C. Radio waves.
D. all the same
Answer: C
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Petroleum, or crude oil, is a black, gooey liquid consisting primarily of
A. hydrocarbons. B. nitrates. C. methane. D. oxygen. E. phosphates.
In which phase(s) of the demographic transition model are birth rate and death rate about equal?
A) Preindustrial B) Transitional C) Industrial D) Preindustrial and Post-Industrial E) Preindustrial and Industrial
Whereas race is a problematic way of differentiating human beings based on physical characteristics such as skin color, ________ creates differences out of cultural traits and complexes
A) ethnicity B) gender C) class D) racism E) cultural nationalism
The speed of the wind is unaffected by ________
A) friction B) pressure gradient C) the Coriolis effect D) differences in heating between locations E) the roughness of Earth's surface