Five million gallons per day (mgd) of wastewater, with a concentration of 10.0 mg/l of a
conservative pollutant, is released into a stream having an upstream flow of 10 mgd and
pollutant concentration of 3.0 mg/l.
(a) what is the concentration in ppm just downstream?
(b) how many pounds of substance per day pass a given spot downstream? (you may want the
conversions 3.785 l/gal and 2.2 kg/lbm from appendix a.)

(c) draw a diagram showing the streams with flow rates and concentrations

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

2b2t

explanation:

2b2t

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.