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Up: Lakes as Well-Mixed... Previous: Question 2
Let's finish our three question quiz. Again, click on the answer you believe is correct. If you don't feel comfortable about which model to use, go to the section on modeling. (You can also refer to the previous page for a summary of the three input function we are using.)

Question 3: (Woo-hoo!) An electroplating company has just begun operation and has been given permission to send its treated waste water, which contains a relatively constant concentration of nickel, twenty-four hours a day into a nearby stream. In this case, we could best model the input to the stream as

  1. an impulse input function;
  2. a step input function;
  3. a sinusoidal input function.


John Hoggard <hoggard@math.vt.edu>
Last modified: Sun Aug 10 17:40:36 EDT 1997