Two identical chunks of clay undergo an inelastic collision. Momentum before and after the collision is the same as before the collision. Kinetic energy is a different story, since part of it transforms into heat. The percentage of kinetic energy transforming into heat is
A. 25%
B. 0%
C. 75%
D. 50%
Answer: D
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The Chinese region that has experienced the greatest recent economic expansion is the coastal provinces
Indicate whether the statement is true or false
Floodplains usually contain
a. highly productive wetlands b. debris that has been deposited during floods c. high concentrations of agricultural chemical runoff d. pest insect populations e. nutrient poor soil
Which of the following would be an example of urban gentrification?
A) the movement of young urban professionals from a major city like Minneapolis to a smaller nearby community, such as Mankato, in order to take advantage of lower housing costs B) an urban design movement which stresses high-density, mixed-use, pedestrian-scaled neighborhoods where residents are able to walk to work, school and shopping centers C) the building of office parks and complexes along the periphery of a major city, such as Costa Mesa, located south of Los Angeles D) the movement of minority populations from the urban core into the suburbs E) the displacement of low-income inner city residents so as to revitalize an inner city with new shopping, entertainment and office plazas, often taking advantage of historic urban architecture patterns, such as Pioneer Square in Seattle and the Inner Harbor of Baltimore
The Arab Spring began from the protest of a Tunisian street vendor who ultimately set himself on fire on
a. December 17, 2009. b. December 17, 2010. c. December 17, 2008. d. December 17, 2011. e. None of the choices are correct.