Choose the correct answer (A to D). For a pharmaceutical gelQuestion 7Answera.Above a given shear rate, a pharmaceutical gel behaves as a Newtonian fluidb.Viscosity is independent on temperaturec.All of the answers are correctd.As the shear rate is increases the gel viscosity increases.
Question
Choose the correct answer (A to D). For a pharmaceutical gelQuestion 7Answera.Above a given shear rate, a pharmaceutical gel behaves as a Newtonian fluidb.Viscosity is independent on temperaturec.All of the answers are correctd.As the shear rate is increases the gel viscosity increases.
Solution
The correct answer is a. Above a given shear rate, a pharmaceutical gel behaves as a Newtonian fluid.
This is because Newtonian fluids have a constant viscosity and flow characteristics that are independent of the applied shear rate. Non-Newtonian fluids, like gels, can act like Newtonian fluids at high shear rates.
Option b is incorrect because the viscosity of a substance generally depends on the temperature.
Option d is also incorrect because for most gels, as the shear rate increases, the viscosity decreases, not increases. This is known as shear thinning.
Therefore, option c is also incorrect because not all of the answers are correct.
Similar Questions
Newton’s law of viscosity states thata. the shear stress applied to the fluid is directly proportional to the velocity gradient du/dyb.the shear stress applied to the fluid is inversely proportional to the velocity gradient du/dyc. the shear stress applied to the fluid is directly proportional to the specific weight of the fluidd.the shear stress applied to the fluid is directly proportional to the specific weight of the fluid
With the increase in temperature, the viscosity of a liquid
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Choose the correct statements.(a) Polymers behave as elastic body at low temperatures and high rates of strain(b) At high temperatures and low rates of strain polymers behave in a viscous manner, flowing like a liquid(c) At low temperatures and high rates of strain polymers behave in a viscous manner, flowing like a liquid(d) Polymers behave as elastic body at high temperatures and low strain ratesQuestion 4Select one or more:a.(a)b.(c)c.(b)d.(d)
Viscosity and coefficient of Viscosity and units
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