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?