What is the velocity of a stream with a cross sectional area of 300 m2 and a discharge of 600 m3/s?
A. 1 m/s
B. 2 m/s
C. 3 m/s
D. 4 m/s
Answer: B. 2 m/s
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Ecologists have learned that succession is influenced by many factors other than climate alone including
A. invasive species, human land use history, and seed dispersal. B. biogeochemical cycles, available oxygen, and superfund sites. C. slope, wind patterns, and toxicity levels. D. the evolution of new species.
There is little evidence to support that changes in the thermal structure of lakes may block the mixing between surface and deep waters
Indicate whether the statement is true or false
The longest of all visible light waves are ________
A) violet B) red C) green D) yellow E) orange
The price at which supply equals demand is ________.
A. market equilibrium B. terminal costs C. break point D. spatially fixed costs