PHA 327 - Exam 2 - Disperse Systems 1

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What is a dyne?

A unit of force equal to (g x cm)/sec2
What unit of force is equal to (g x cm)/sec2?

Dyne
What is a poise?

g/(cm x sec)
What unit of measure is equal to g/(cm x sec)?

Poise
What does η stand for?

Viscosity
What is the equation for kinematic viscosity?

Kinematic viscosity = n/p
What are the units of kinematic viscocity?

Stoke (s)
What is the equation for fluidity?

Fluidity =1/n
Fluidity is inversely proportional to what?

Viscosity
Viscosity is inversely proportional to what?

Fluidity
Give the equation that describes the effect of temperature on viscosity?
- A = a constant
- Ev= activation energy required to initiate flow
- R = gas constant
- T = absolute temperature
What equation describes Newtonian liquids?
What is the equation for Rate of shear?
- Rate of Shear = dv/dr
What does Rheo mean?

Flow
What is another designation for flow?

Rheo
What is another designation for science?

Logos
What does logos mean?

Science
What substances flow?

Liquids and gels (partial flow)
What is the equation for shearing stress?

Shearing stress = F/A
What is Einstein’s equation for colloidal particle flow?
- Rate of Shear = dv/dr
What is Einstein’s equation for colloidal particle flow?