What country has Vietnam primarily emulated as it works to improve its economy?
A) United States
B) China
C) South Korea
D) Japan
E) India
B
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Nanotechnology may play an important role in the development of
A. windfarms. B. a storage medium for hydrogen fuel. C. space elevators. D. bullet proof clothing. E. all of the above
Solar trough technology converts
A) the ultraviolet light in sunlight into electricity. B) the heat of the sun into steam to drive a turbogenerator. C) sunlight into electricity, which then produces steam heat. D) the direct current generated by photovoltaic cells into alternating current.
On June 21st which location will be receiving 24 hours of daylight?
A. Tropic of Capricorn B. Arctic Circle C. Tropic of Cancer D. Antarctic Circle
Much of the early hydrogen and helium escaped the earth's atmosphere into space because ________
A) Solar winds were strong B) The earth's gravity was strong C) Solar winds were weak D) The earth's gravity was weak E) All of the above