Tertiary sewage treatment is designed to remove
A. Sludge
B. Large solids
C. Suspended solids
D. Dissolved organic compounds
E. Nitrates and phosphates
Answer: E
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Generate a histogram of the salaries.
The following values represent the salaries paid by a university department to all of its employees, omitting units: 27, 60, 143, 25, 24, 27, 42, 98, 29, 30, 97, 59, 26, 43, 27, 44, 25, 27, 26, 61, 145, 26, 40, 27, 46, 28, 24 What will be an ideal response?
Describe the role social inequality plays in population growth.
What will be an ideal response?
Tsunami events at a coastline ________.
A. always begin with a rising of the sea B. always begin with a retreat of the sea C. can start with a drawdown or rising of the sea D. are always preceded by a large rogue wave
Hydrothermal vents are considered both a source and sink for ocean salts. How can one factor both add and take away salt?
a) As water interacts with hot rock, some materials are dissolved whereas others are deposited. b) Due to random variations in chemical reactions, salts are both deposited and dissolved in the vents. c) The dissolved material cycles round and round in the vents, first being precipitated and then dissolved, then repeating again and again. d) Hot vents give off material first as gas, which precipitates salt, only to be dissolved by fluids moving through the vent plumbing. e) The statement is incorrect. Hydrothermal vents are only a source for salts, not a sink.