Compared to the kinetic energy of a car traveling at 30 km/h, a car of half the mass traveling at 60 km/h has
A. the same kinetic energy.
B. less kinetic energy.
C. greater kinetic energy.
D. need more information
Answer: C
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The composition of the Milky Way does not include:
A) stars B) gases C) dust D) galaktos
Water that has trickled down into a joint in a rock can freeze, expand, and ________.
A. glue the rock more tightly together B. widen the crack and hastening the rock's disintegration C. seal the crack thereby preventing further weathering D. displace surface acids that may weaken the rock E. make the rock harder
What is NOT a drawback of hydropower?
A) The electricity generated is incredibly expensive (more than coal, oil, and nuclear power). B) It is disruptive to the natural environment. C) It can increase diseases. D) Silting of reservoirs can occur, which reduces the potential to produce electricity. E) Downstream users of rivers might resent upstream countries damming a river.
The pirozhki is an example of:
A) hybrid culture of Europe and Asia B) the poetry of Pushkin C) 18th century high culture D) Russian modern art E) overreach of bureaucracy