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W is the number of states that a system can have

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Quiz 4 November 22, 2010 Properties of Materials

a) The 6-12 Lennard-Jones potential and the DLVO potential both involve two terms. Explain the similarities and differences between these two potentials.

b) Obtain an expression for the sedimentation velocity using a force balance between viscous drag and gravity.

c)  What  is  the  zeta  potential?

d) How  can  the  zeta  potential  be  measured?

e) The equation S = k log W is carved on Boltzmann’s grave in the Central Grave Yard of Vienna. W is the number of states that a system can have. Explain how this can be used to calculate the concentration of ions subject to an electrical field Φ?

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