29 Questions
What is the physical parameter that can be defined using Poiseuille's law?
Viscosity
What is the purpose of dividing the equation for one liquid by the equation for the second liquid in Poiseuille's law for two fluids?
To determine the ratio of viscosities
What is the assumption made when applying Poiseuille's law to two fluids?
The viscometer constants are the same
What is the purpose of using a liquid of known density and viscosity, such as water, in Poiseuille's law?
To calculate the viscosity of the unknown liquid
What is the unit of measurement for the acceleration due to gravity (g) in Poiseuille's law?
ms^-2
What is the term that groups all constant parameters in Poiseuille's law?
h
What is the study of the flow and deformation properties of matter?
Rheology
What is the resistance of a fluid to flow or movement?
Viscosity
Which of the following fluids is easier to stir or pour?
Water
What is the main objective of studying rheology in pharmaceutical formulations?
To understand the flow and deformation properties of matter in pharmaceutical formulations
What is the unit of shear stress?
N/m²
What is the main difference between Newtonian and non-Newtonian fluids?
Behavior under stress
What is the relationship between shear rate and shear stress in a Newtonian fluid?
Shear rate is directly proportional to shear stress
What is a common application of rheology?
Pharmaceutical formulations
What is the dimension of dynamic viscosity?
N/m²·s
What is the difference between shear stress and pressure?
Shear stress is a force per unit of lateral area, while pressure is a force per unit of normal area
What is the unit of kinematic viscosity?
m²/s
What is the characteristic of a fluid with a steeper curve in a viscosity graph?
More viscous
What is the unit of viscosity in the given table?
mPa·s
What type of fluids obey Newton's law?
Newtonian fluids
What is the characteristic of a Non-Newtonian fluid?
The shear stress is not directly proportional to the shear rate
What is the name of the flow type characterized by a yield value (σy)?
Plastic or Bingham flow
What is the term for the apparent viscosity at a defined shear stress value and temperature?
Apparent viscosity
Which of the following is an example of a Pseudoplastic fluid?
Polyacrylic acid solution
What is the unit of measurement for dynamic viscosity?
Pa · s
How can the dynamic viscosity of a Newtonian fluid be obtained from a plot of shear rate vs shear stress?
By calculating the slope of the line
What is the correct statement about the power law?
n = 1 represents Newtonian flow
What is the unit of measurement for shear stress?
Pa
What is the relationship between shear rate and shear stress in a plot for a Newtonian fluid?
Shear stress increases linearly with shear rate
Test your knowledge on rheology, viscosity, and their importance in pharmaceutical formulations. Learn about Newtonian and non-Newtonian fluids and their behavior. Join the Vevox quiz to assess your understanding of these concepts.
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