A projectile is fired vertically from the surface of Earth at 10 km/s. The projectile will
A) go into circular orbit about Earth.
B) go into an elliptical orbit about Earth.
C) rise and fall back to Earth's surface.
D) none of the above
C
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The current world population is approximately
A. 1.5 billion. B. 4.2 billion. C. 7.1 billion. D. 10.1 billion. E. 15.8 billion.
How does spilled oil, such as that in the 2010 Deepwater Horizon spill, affect oceanic organisms?
A) The type of bacteria that consumes oil thrives B) Animals that ingest oil become ill or die C) Shallow ocean plants are harmed when the oil blocks incoming sunlight D) All of these choices are correct
Europe's two most populous cities are:
A. Rome and Madrid B. London and Paris C. Paris and Berlin D. Berlin and Rome
What type of storm was Superstorm Sandy?
a. A tropical disturbance b. An extratropical cyclone c. A hurricane d. A nor'easter and a tropical storm e. A hurricane and an extratropical cyclone