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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is effective diffusivity (DA3)?
💡 Hint: Think about how substances migrate through different materials.
Question 2
Easy
Define porosity.
💡 Hint: It relates to how much space exists within solids.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does DA3 represent in diffusion studies?
- Concentration
- Effective diffusivity
- Porosity
💡 Hint: Think of it as the rate of movement through porous materials.
Question 2
True or False: Higher porosity increases diffusion rates.
- True
- False
💡 Hint: Relate this to paths available for substances.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A contaminated site has a porosity of 0.25 and an effective diffusivity of 2.5e-5 m²/s. If the retardation factor is 1.5, calculate the rate of contaminant movement over time.
💡 Hint: How does the retardation factor influence the overall migration speed?
Question 2
Assuming a linear concentration gradient exists across a distance of 4 meters with a given effective diffusivity of 1.2e-4 m²/s. How long will it take for the substance to cover this distance?
💡 Hint: What is the formula for time based on distance and diffusivity?
Challenge and get performance evaluation