Over time, dissolved magnesium concentration in a lake has reached equilibrium. Input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments. If wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,
A. the BOD of the lake will be cut in half.
B. the BOD of the lake will double.
C. the residence time of magnesium in the lake will double.
D. the residence time of magnesium in the lake will be halved.
Answer: D
You might also like to view...
The Earth’s atmosphere became enriched in O2 during the
a. Devonian. d. Precambrian. b. Cambrian. e. Cenozoic. c. Mesozoic
The variety of appearances and protective demonstrations associated with organisms on the coral reef is a testament to the intense struggles in the ecosystem
Indicate whether the statement is true or false
Once precipitation has fallen on land, it may take one of three paths. List these three possible routes
What will be an ideal response?
The U.S. generates how much of the world's solid waste?
A. 33% B. 40% C. 50% D. 25%