To minimize heat loss it is best that a teapot be
A. black.
B. silver.
C. depends on size, not color
D. not enough information
Answer: B
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For the purpose of gathering comparable data, the United Nations has imposed a precise definition of the meaning of urban upon the world's states
Indicate whether this statement is true or false.
If a river originates 200 meters above sea level and travels 100 kilometers to the ocean, what is the average gradient in meters per kilometer?
A) 0.2 meters per kilometer B) 0.5 meters per kilometer C) 2 meters per kilometer D) 5 meters per kilometer E) None of these are correct.
Coal metamorphosed to medium metamorphic grade would become a(n)
A) lignite. B) anthracite. C) subbituminous coal. D) bituminous coal.
Whether volcanic eruptions are very explosive or relatively quiet is largely determined by
A. the ease or difficulty with which the gas escapes to the atmosphere B. the viscosity of a lava C. the amount of gas in the lava or magma D. all of the preceding