The speed of a satellite in circular orbit doesn't change because gravitational force on it is
A. canceled by centrifugal force.
B. very weak due to altitude.
C. perpendicular to its direction of motion.
D. small compared to other forces on it.
Answer: C
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A derecho
A) occurs only in the Southwest. B) lasts from a few seconds to a few minutes. C) is associated with severe thunderstorms. D) has mild to moderate winds. E) does not cause property damage.
The largest non-white racial group in the United States as of the 2010 census was what?
A) Asian B) Black or African American C) hispanics or Latino D) Mixed Race
Which of the following rocks would be more likely to experience brittle deformation rather than ductile deformation when subjected to stresses that exceed their strength?
A) Rock salt B) Sandstone C) Schist D) Quartzite
General circulation models (GCMs) of the atmosphere
A) are based on statistical three-dimensional grids that characterize portions of the atmosphere and ocean in terms of climate-related variables. B) are pre-computer based models that estimated atmospheric and oceanic circulation and are now being used to study climate change. C) calculate the concentrations of greenhouse gases in the atmosphere based on data from weather stations located around the globe. D) are highly simplistic models that use one or two variables to test the veracity of climate proxies, such as ice core and ocean sediment core samples. E) weather forecasting models to predict occurrences of severe weather events.