Pesticide in a reservoir. A reservoir is used to catch runoff during storms for a development. After a heavy rain, the reservoir is full, and the rainwater that filled it was from runoff from a nearby field that had just had a large amount of pesticide applied to it. Now that the reservoir is full, the water has no inflow or outflow. Consider the fate of the pesticide in the reservoir water, and: Calculate the half-life of the pesticide if it reacts with a first order decay rate constant of 0.25 h−1. What fraction of the pesticide will be removed from the water by reaction after 1.5 hours? How long will it take for 70% of the pesticide to decay from the reservoir water?
Pesticide in a reservoir. A reservoir is used to catch runoff during storms for a development. After a heavy rain, the reservoir is full, and the rainwater that filled it was from runoff from a nearby field that had just had a large amount of pesticide applied to it. Now that the reservoir is full, the water has no inflow or outflow. Consider the fate of the pesticide in the reservoir water, and: Calculate the half-life of the pesticide if it reacts with a first order decay rate constant of 0.25 h−1. What fraction of the pesticide will be removed from the water by reaction after 1.5 hours? How long will it take for 70% of the pesticide to decay from the reservoir water?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Pesticide in a reservoir. A reservoir is used to catch runoff during storms for a development.
After a heavy rain, the reservoir is full, and the rainwater that filled it was from runoff from a nearby field that had just had a large amount of pesticide applied to it. Now that the reservoir is full, the water has no inflow or outflow. Consider the fate of the pesticide in the reservoir water, and:
- Calculate the half-life of the pesticide if it reacts with a first order decay rate constant of 0.25 h−1.
- What fraction of the pesticide will be removed from the water by reaction after 1.5 hours?
- How long will it take for 70% of the pesticide to decay from the reservoir water?
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