Which of the following factors is responsible for keeping a planet's atmosphere close to its surface?
A. pressure
B. cloud cover
C. gravity
D. moisture
Answer: C
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Which datum are GPS readings based on?
A. NAD83 B. WGS84 C. CORS96 D. NAD27
The year 2008 revealed one of the economic risks of continued reliance on oil, when
A) 52% of the oil refineries in the United States had to shut down. B) the Alaskan pipeline ruptured, reducing oil supplies in the United States by 37%. C) gasoline prices reached new highs. D) shipments of oil from overseas were reduced by 46%.
Seawater that exceeds the 35‰ average is termed
A) brackish. B) brine. C) mesohaline. D) freshwater.
The R/V Spartina is cruising off the Georgia coast taking water and sediment samples when she encounters a storm. The ship's captain asks you to assist him by calculating the frequency of the waves and the wavelength
The wave speed is measured at 4 meters per minute. The wave period is determined to be 12 seconds. What is the wavelength and frequency of the storm swells encountered by the R/V Spartina?