A rolling freight car collides with an identical freight car at rest. After coupling they roll with a speed of 2 m/s. From this information the initial speed of the lighter freight car was
A. 4 m/s.
B. 8 m/s.
C. 6 m/s.
D. 5 m/s.
Answer: A
You might also like to view...
African river blindness is caused by a roundworm carried by biting black flies. When bitten by a fly, larval worms are passed through the wound. Inside a human body, the parasites cause skin problems and eventually blindness. Which type of species interaction is represented here?
A. parasitism B. predator-prey C. commensalism D. resource partitioning
Which of the following is meant by “double politics”?
a. Grassroots organizing and top-down authority b. Collective and individual action c. Conflict and consensus d. Conceptions and connections
Weathering is the transportation or removal of broken-down materials
Indicate whether this statement is true or false.
World-systems theorists such as Wallerstein argue that an artificial division of labor has made earning a good income from free trade difficult for most
A) countries and corporations. B) transnational corporations (TNCs). C) multinational corporations (MNCs). D) more developed countries (MDCs). E) less developed countries (LDCs).