4.3.1 - Molecular Levels and Viscosity
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Practice Questions
Test your understanding with targeted questions
Define shear stress in the context of fluid dynamics.
💡 Hint: Think of friction between two moving fluid layers.
What happens to liquid viscosity when the temperature is increased?
💡 Hint: Consider how heating affects movement at a molecular level.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is shear stress?
💡 Hint: Relate it to friction between fluids.
True or False: Increasing temperature decreases the viscosity of gases.
💡 Hint: Think about how molecules interact at higher temperatures.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A bacterial culture medium has a viscosity of 0.9 Pa.s at 25°C. If the temperature increases to 37°C, how will the viscosity change? Assume it behaves like a typical liquid.
💡 Hint: Consider the behavior of liquids as they heat up.
You have a fluid that behaves as a dilatant; as shear stress increases, the required force to maintain flow also increases. Describe an application where this property might be beneficial.
💡 Hint: Think about scenarios where increasing resistance to flow could provide safety.
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