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3 cards from this section. Quick, good the night before a test.
Define shear stress in the context of fluid dynamics.
Think of friction between two moving fluid layers.
What happens to liquid viscosity when the temperature is increased?
Consider how heating affects movement at a molecular level.
What is shear stress?
Relate it to friction between fluids.
True or False: Increasing temperature decreases the viscosity of gases.
Think about how molecules interact at higher temperatures.
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.
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.
Think about scenarios where increasing resistance to flow could provide safety.
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