Which statement best describes shear-thinning systems?
Understand the Problem
The question is asking for the correct characterization of shear-thinning systems among the provided options, emphasizing their behavior in response to stress and shear rates.
Answer
Fluids whose viscosity decreases with increased shear strain.
Shear-thinning systems are best described as fluids whose viscosity decreases with an increase in shear stress or shear strain.
Answer for screen readers
Shear-thinning systems are best described as fluids whose viscosity decreases with an increase in shear stress or shear strain.
More Information
Shear-thinning is a common behavior in many non-Newtonian fluids such as ketchup and blood, where they become less viscous under force, allowing them to flow more easily when stirred or shaken.
Tips
A common mistake is confusing shear thinning with shear thickening, where viscosity increases with stress.
Sources
- Shear thinning - Wikipedia - en.wikipedia.org
- Non-Newtonian fluids - Science Learning Hub - sciencelearn.org.nz
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