Interpretation: The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream water due to the farmer’s yearly application of fertilizer is to be calculated.
Concept introduction: The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream water
To determine: The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream water due to the farmer’s yearly application of fertilizer.
Answer to Problem 1.89AP
Answer
The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream per year is
Explanation of Solution
Explanation
Given
The amount of fertilizer used by farmer in one year is
The amount of nitrogen in farmer’s fertilizer is
The amount of fertilizer that is ran off by stream in one year is
The average rate of stream flow is
The amount of fertilizer in kilogram that is ran off by stream in one year is,
The amount of nitrogen in stream water is,
The conversion of kilogram into milligram is,
Convert the amount of nitrogen in stream water into gram.
The average rate of stream flow is
The conversion of cubic meter into liter is,
The conversion of minute into year is,
Convert the average rate of stream flow into liter per year.
The above value indicates that the amount of stream water in one year is
The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream water
Substitute the amounts of nitrogen in stream water
Therefore, the additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream per year is
Conclusion
The additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the stream per year is
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