The average concentration of a substance (g/m3) in a lake where the area As(m2) varies with depth z(m) can be computed by integration:
where Z = the total depth (m). Determine the average concentration based on the following data:
z,m | 0 | 4 | 8 | 12 | 16 |
A,106 m2 | 9.8175 | 5.1051 | 1.9635 | 0.3927 | 0.0000 |
c,g/m3 | 10.2 | 8.5 | 7.4 | 5.2 | 4.1 |
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